---
product_id: 4828850
title: "SafeStart Plus, For Newly Set-Up Fish aquariums, 100 ml, 3.38-Ounce"
brand: "tetra"
price: "฿1418"
currency: THB
in_stock: true
reviews_count: 8
category: "Tetra"
url: https://www.desertcart.co.th/products/4828850-safestart-plus-for-newly-set-up-fish-aquariums-100-ml
store_origin: TH
region: Thailand
---

# Live beneficial bacteria boost Fast 3-day tank cycling Ammonia & nitrite toxin reduction SafeStart Plus, For Newly Set-Up Fish aquariums, 100 ml, 3.38-Ounce

**Brand:** tetra
**Price:** ฿1418
**Availability:** ✅ In Stock

## Summary

> 🐠 Fast-track your aquarium’s health—because your fish deserve the best start!

## Quick Answers

- **What is this?** SafeStart Plus, For Newly Set-Up Fish aquariums, 100 ml, 3.38-Ounce by tetra
- **How much does it cost?** ฿1418 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/4828850-safestart-plus-for-newly-set-up-fish-aquariums-100-ml)

## Best For

- tetra enthusiasts

## Why This Product

- Trusted tetra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Since 1951:** Backed by decades of aquatic expertise, ensuring reliable and proven aquarium health support.
- • **Stress-Free Fish Introduction:** Start adding fish immediately without risking new tank syndrome or toxic spikes.
- • **Versatile Use for Every Stage:** Perfect for new setups, water changes, filter swaps, or post-medication recovery.
- • **Cycle Your Tank in Just 3 Days:** Skip the wait—get a fully cycled aquarium in record time with fast-acting live bacteria.
- • **Instantly Neutralizes Harmful Toxins:** Effectively reduces dangerous ammonia and nitrite levels for a safe aquatic environment.

## Overview

Tetra SafeStart Plus is a 100 ml liquid treatment that accelerates the establishment of beneficial bacteria in newly set-up freshwater aquariums. It rapidly cycles tanks by reducing toxic ammonia and nitrite levels, preventing new tank syndrome, and enabling immediate, safe fish introduction. Trusted by aquarists since 1951, this fast-acting formula supports a healthy aquatic environment from day one.

## Description

Tetra SafeStart Plus creates a biologically active environment to allow fast introduction of fish into newly set-up fish aquariums. Tetra SafeStart Plus reduces dangerous ammonia and nitrite and prevents new tank syndrome for a healthy start for fish in all freshwater aquariums. Contains live bacteria that start working immediately to provide a safe environment for new fish. Tetra SafeStart Plus can also be used after a water change, when adding fish or after medicating.“Cycling” your tank means growing the correct, healthy bacteria on a new filtration system to remove dangerous toxins. New filters are sterile and take 30 to 40 days for bacteria to naturally form. This concentrated formula speeds up the cycling process by accelerating the establishment of beneficial bacteria from the start for instant, safe results. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need–-from a large variety of quality fish food and innovative equipment to test kits and decor.

Review: Works in 3 days! Tank cycled! - Works every time! I restarted my 20-gallon long tank with new substrate and a new filter, keeping only a small piece of bio sponge. I also switched to soft RO with low ph water from very hard high ph, so I wasn’t sure whether any of the remaining beneficial bacteria survived the change. The bio colony probably took a major hit—maybe even died off completely. After adding Tetra SafeStart Plus, my tank was fully cycled in just three days! Ammonia dropped to zero and nitrates started showing up. WOW! I could have added fish back after those three days, but I waited a little longer just to make sure there were no new spikes. A week later with fish in the tank—still no spikes. I consider the tank cycled again. I can actually see the nitrifying bacteria attaching to the glass in little transparent brown circles and everywhere else, like watching a little petri dish inside my aquarium grow. It’s all good! I’ll let it stay on the glass for a bit before cleaning it off. I poured the whole 3.39 ounce bottle into the filter.
Review: EXCELLENT PRODUCT - Works well. I have done this successfully several times. Make sure you purchase Tetra SafeStart "Plus" and not just SafeStart. Bottle labels are almost identical. Check with the manufacturer if you have questions. Follow the SafeStart "Plus" directions for your size tank. Check the various manufacturer's sites for directions on all products you plan to use. My personal suggestions follow. Patience helps. I am not in favor of fishless starting, while others prefer it. My preference is to start the cycle with fish. Purchase at your LFS, a hardy danio/minnow that you will either keep or return/donate unharmed after a short time. My method proceeds like this: After establishing a stable temperature and filter/light setup for a couple of days, (1) add chlorine/chloramines conditioner, (2) SafeStart "Plus", (3) an ammonia/nitrite/nitrate conditioning additive, and (4) finally the one danio, all in about a 15-minute period in the described order to your aquarium. Additives are used in accordance with manufacturer's recommended concentrations and directions. I prefer to introduce fish slowly rather than all at once. An exception would be extremely territorial types. I am uncomfortable guessing as to the formation of the cycling process, so I test for ammonia, nitrite and nitrate every couple of days. Some skip testing for ammonia. When nitrite forms, then increases substantially and then decreases to "0" and nitrate forms, the cycle is complete. Another fish, or two, may be added when nitrite and ammonia readings are both "0". Overall, ammonia should always remain "0". Nitrite should always remain "0". Continue fish addition each week or so, adding fish sparingly to not more than the stocking maximum for your size aquarium. Less is better. Be patient. Test water parameters. In an abundance of caution, I add a small amount of SafeStart "Plus" daily for about a week or two. Every other day, I add chlorine/chloramines conditioner (converts the chlorine/chloramines and also the ammonia to less toxic forms) to reduce stress on the fish. Dose the conditioner as per bottle directions. What is happening: (1) The bottle bacteria initiate the cycle until naturally forming bacteria are established within the filter and on aquarium surfaces. The natural bacteria are required long term. (2) The chlorine/chloramines/ammonia conditioner converts these chemicals to less toxic forms to help protect the fish during the cycle initiation. (3) Maintain the filter as directed by the manufacturer. Make regular, periodic conditioned water changes, as per your LFS suggestions. The use of modern, chlorine/chloramines/ammonia conditioners during the cycling initiation will not interfere with cycle completion. Check with the manufacturer if concerned. There are several excellent chlorine/chloramines/ammonia conditioning products available. Always use them in accordance with the manufacturer's recommendations. I have my favorites. Consult your LFS for advice and confirm on the manufacturer's site. An abundance of helpful reference literature on aquariums is available.

## Features

- PREVENTS NEW TANK SYNDROME Accelerates of the establishment of healthy bacteria in newly set-up freshwater aquariums
- REDUCES TOXINS Helps remove dangerous levels of ammonia and nitrite
- ACCELERATES TANK CYCLING Helps establish a healthy tank from the start for instant results
- FAST-ACTING Starts working immediately to provide a healthy environment for new fish without a long wait
- USAGE Treat when setting up a new aquarium after a water or filter change when adding new fish or after medication

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Tetra |
| Customer Reviews | 4.6 out of 5 stars 1,585 Reviews |
| Item Form | Liquid |
| Item Weight | 0.26 Pounds |
| Liquid Volume | 100 Milliliters |
| Manufacturer | Tetra |
| Pet Type | Dog |

## Product Details

- **Brand:** Tetra
- **Item Form:** Liquid
- **Item Weight:** 4.19 ounces
- **Liquid Volume:** 100 Milliliters
- **Manufacturer:** Tetra

## Images

![SafeStart Plus, For Newly Set-Up Fish aquariums, 100 ml, 3.38-Ounce - Image 1](https://m.media-amazon.com/images/I/61N39jlsVFL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will these steps work: let conditioned water run for 3 days. Add the fish and tetra safe start at the same time. Tank=cycled?**
A: I agree about the statement that 2 weeks are needed at a minimum to fully cycle a tank. Safe start definitely speeds up the process, which usually takes over a month.  If you have a trusted store or friend with an aquarium free of disease, you can also transfer some gravel/substrate or sponge media to speed the process a bit more, but putting fish in before a full two weeks is torturing them (if they even survive) by burning their gills with nitrates and nitrites.  I once tried to put a fish at one week because my test kits (didn’t know they had expired) were indicating that the tank was fully cycled.  The fish was in great distress so I returned it to the store, not wanting to kill it.  At two weeks, I introduced another fish and he’s still happily living in the tank over two years later.  

Please don’t use fish to cycle your tank.  I use aquatic plants that are on the hardier side (Java ferns, Anubias, water wisteria, cryptocoryne…).  Otherwise, you can also dose ammonia (search online for technique) or fish flakes (though they can sometimes get moldy).

**Q: After 4 days my ammonia is 0, nitrite is 0 and nitrates are 5ppm. Is my tank cycled or are these false readings?**
A: That's what happened to my old tank and it stayed cycled! I added safestart at water changes or if adding new fish and all was fine

**Q: can I use water conditioner and this product at the same time?**
A: I know this is a old post but I don't want anyone to read this and loose their fish bc of wrong answers. You CAN NOT use this the same day as a water conditioner. You should use a water conditioner first but you MUST wait 24 hours atleast to add safe start plus. If you read about water conditioner (for instance Prime) it binds ammonia making it harmless to your fish for 24 to 48 hours. The bacteria in Safe start plus need ammonia to feed on. It is, after all, the bacteria that eats ammonia In your tank. If there is no ammonia for it to feed on it will die. So it will be useless and a waist of money if you add it before waiting atleast 24 hours after your water conditioner. I always wait 48 hours to be safe.

**Q: When should i see result ?**
A: It works right away. It's good you have fish so the bacteria can eat the ammonis caused by the fish waste. Dont use any ammonia remover within 24 hrs before or after using safe start. You'll kill the food for the bacteria. I wod wait a week before using ammonia remover after you have used the Safestart.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works in 3 days! Tank cycled!
*by S***L on December 11, 2025*

Works every time! I restarted my 20-gallon long tank with new substrate and a new filter, keeping only a small piece of bio sponge. I also switched to soft RO with low ph water from very hard high ph, so I wasn’t sure whether any of the remaining beneficial bacteria survived the change. The bio colony probably took a major hit—maybe even died off completely. After adding Tetra SafeStart Plus, my tank was fully cycled in just three days! Ammonia dropped to zero and nitrates started showing up. WOW! I could have added fish back after those three days, but I waited a little longer just to make sure there were no new spikes. A week later with fish in the tank—still no spikes. I consider the tank cycled again. I can actually see the nitrifying bacteria attaching to the glass in little transparent brown circles and everywhere else, like watching a little petri dish inside my aquarium grow. It’s all good! I’ll let it stay on the glass for a bit before cleaning it off. I poured the whole 3.39 ounce bottle into the filter.

### ⭐⭐⭐⭐⭐ EXCELLENT PRODUCT
*by K***R on November 6, 2017*

Works well. I have done this successfully several times. Make sure you purchase Tetra SafeStart "Plus" and not just SafeStart. Bottle labels are almost identical. Check with the manufacturer if you have questions. Follow the SafeStart "Plus" directions for your size tank. Check the various manufacturer's sites for directions on all products you plan to use. My personal suggestions follow. Patience helps. I am not in favor of fishless starting, while others prefer it. My preference is to start the cycle with fish. Purchase at your LFS, a hardy danio/minnow that you will either keep or return/donate unharmed after a short time. My method proceeds like this: After establishing a stable temperature and filter/light setup for a couple of days, (1) add chlorine/chloramines conditioner, (2) SafeStart "Plus", (3) an ammonia/nitrite/nitrate conditioning additive, and (4) finally the one danio, all in about a 15-minute period in the described order to your aquarium. Additives are used in accordance with manufacturer's recommended concentrations and directions. I prefer to introduce fish slowly rather than all at once. An exception would be extremely territorial types. I am uncomfortable guessing as to the formation of the cycling process, so I test for ammonia, nitrite and nitrate every couple of days. Some skip testing for ammonia. When nitrite forms, then increases substantially and then decreases to "0" and nitrate forms, the cycle is complete. Another fish, or two, may be added when nitrite and ammonia readings are both "0". Overall, ammonia should always remain "0". Nitrite should always remain "0". Continue fish addition each week or so, adding fish sparingly to not more than the stocking maximum for your size aquarium. Less is better. Be patient. Test water parameters. In an abundance of caution, I add a small amount of SafeStart "Plus" daily for about a week or two. Every other day, I add chlorine/chloramines conditioner (converts the chlorine/chloramines and also the ammonia to less toxic forms) to reduce stress on the fish. Dose the conditioner as per bottle directions. What is happening: (1) The bottle bacteria initiate the cycle until naturally forming bacteria are established within the filter and on aquarium surfaces. The natural bacteria are required long term. (2) The chlorine/chloramines/ammonia conditioner converts these chemicals to less toxic forms to help protect the fish during the cycle initiation. (3) Maintain the filter as directed by the manufacturer. Make regular, periodic conditioned water changes, as per your LFS suggestions. The use of modern, chlorine/chloramines/ammonia conditioners during the cycling initiation will not interfere with cycle completion. Check with the manufacturer if concerned. There are several excellent chlorine/chloramines/ammonia conditioning products available. Always use them in accordance with the manufacturer's recommendations. I have my favorites. Consult your LFS for advice and confirm on the manufacturer's site. An abundance of helpful reference literature on aquariums is available.

### ⭐⭐⭐⭐⭐ GREAT product. this really does help your tank cycle ...
*by S***E on July 24, 2016*

GREAT product. this really does help your tank cycle quickly. this time i started up a 2.5 gallon tank with a filter and heater. it houses a single male betta. i set up tank and put the betta in there last sunday. six nights later (last night) i tested the water and i actually have a small amount of nitrates. no ammonia and no nitrites....YAY! a cycyled tank in 6 days. i've also used safe start to cycle a 20 gallon tank and it did so in 9 days. and even during that time i didn't get any ammonia or nitrite spikes at all. my tips are....add safe start and turn off lights (i think uv light kills the bacteria) i added just before turning at night. also SHAKE THE BOTTLE. shake the crap out of it. not sure why, but thats what i've always heard. and go a head and get a master test kit by API...but you need it to track your water's quality.

## Frequently Bought Together

- Tetra SafeStart Plus, For Newly Set-Up Fish aquariums, 100 ml, 3.38-Ounce
- Tetra 77140 EasyBalance PLUS Water Conditioner, 16.9-Ounce
- Tetra AquaSafe Plus, Aquarium Water Conditioner And Dechlorinator, 33.8 Ounces

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/4828850-safestart-plus-for-newly-set-up-fish-aquariums-100-ml](https://www.desertcart.co.th/products/4828850-safestart-plus-for-newly-set-up-fish-aquariums-100-ml)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-06*