Instruction reads use 1 capful for every 50 gallons of new water. So a 35% change on 55 gal. tank, takes 1/4 cap? Sounds too good to be true.

Per Seachem's instructions, if you are doing a partial water change of 35%, if you are adding water directly from the tap (such as with a water changer such as a Python or Aqueon) you add enough Prime for the volume of the whole tank. On the other hand, if you're removing 35% and then adding the water using a bucket, you can dechlorinate the amount of each bucket. For example, if you're using a 3 gallon bucket, 6 drops Prime per bucket, and then add that to the tank. The Prime works almost immediately, so just add the drops to the bucket, and then it is ready to pour into your tank.

How long does it take to work when setting up a new tank? Thanks!!

this removes the chlorine, etc. almost immediately, I add it to the aquarium when doing water changes, ands just pour the water into the tank. remember this just removes the harmful chemicals, your tank will still have to cycle through the nitrogen cycle if you are setting up a new tank.

I end up with alot of foam at the top of my aquariums when I add prime,Have I added too much to my tap water changes,My Tap water is high in iron

The small bottle of prime has a flip cap which allows you to add drops. If you have the large bottle of Prime use an eye dropper. When doing a water change, fill a clean, never seen soap or chemicals bucket of fresh water and add Prime to this fresh water, not directly into your tank - 2 drops per gallon. I also do not get foam. I do a 50 - 60 percent water change weekly along with a gravel vac. If you are stll getting foam after a gravel vac and water change I would suggest you give Seachem a call. They have great customer service. When cleaning your tank, give your filter sponge, floss a swish around in used tank water also to remove some of the gunk and put right back in. Do not rinse in untreated fresh water, by doing so you can lose your cycle.

I'm looking to remove chlorine from my pool, will this work?

It will work but there may be less expensive options from a pool dealer. It decholorinates any typerson of water.

Seachem Prime 100 Ml 3 4 Fl Oz | Desertcart Thailand

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

฿1143

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

Description

Prime is the complete and concentrated conditioner for both fresh and salt water Prime may be used during tank cycling to alleviate ammonia/nitrite toxicity and prime detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them It will also detoxify any heavy metals found in the tap water at typical concentration levels Prime also promotes the production and regeneration of the natural slime coat, prime is non-acidic and will not impact ph, prime will not overactivate skimmers Review: Great even for small Aquarium s - I have an aquarium since 2014 and it was from 2025 end and early 2026 that I found my fishes dying repeatedly .I found Seachem Prime and after every water change I started using this as directed and my fish friends love it .Great product. Review: Urmila Toke - Very good

Specifications

ASIN	B000255PFI
Best Sellers Rank	#2,012 in Pet Supplies ( See Top 100 in Pet Supplies ) #17 in Water Treatments
Brand	Seachem
Brand Name	Seachem
Customer Reviews	4.6 out of 5 stars 7,110 Reviews
Global Trade Identification Number	00000116043502
Item Form	Liquid
Item Weight	3.5 Ounces
Liquid Volume	100 Millilitres
Manufacturer	SEACHEM LABORATORIES
Manufacturer Part Number	075222
Model Number	67104350
Net Quantity	250 Milliliters
Target Species	Fish
UPC	703062507042 000116043502
Unit Count	250 Milliliters
Warranty Description	no warranty available

Reviews

D**U

Great even for small Aquarium s

I have an aquarium since 2014 and it was from 2025 end and early 2026 that I found my fishes dying repeatedly .I found Seachem Prime and after every water change I started using this as directed and my fish friends love it .Great product.

13.05.2026

U**E

Urmila Toke

Very good

9.05.2026

J**E

A Saviour!

No more worries when topping up or changing water using normal tap water.

25.01.2026

J**M

Reliable and effective water conditioner

This conditioner does what it claims. Simple to use, effective, and long lasting. Typical Seachem quality. Satisfied with the purchase.

13.12.2025

U**A

Looks Very Good And I didn’t Tried Yet

I’ll Update After Adding New Water With “Seachem Prime” In the Aquarium It’s been recommended by Majority Of YouTubers And It’s an Expensive brand and also No compromising in the Quality! EDIT: I'll definitely recommend this product it’s been since over an Year just half of the bottle got completed I’m using for my 24 L Betta Tank!❤️

14.04.2024

P**.

Originality

Fully original product. Very good for aquarium. Quite good product in comparison with others. This seller sells genuine Seachem products.

30.06.2021

S**T

Best De-Chloninator

Best product to go for, if you are using tap water for your aquarium. Remember, this is more a de-chlorinator than anything else. You have other products to remove cloudiness etc. You can either choose to pre-mix with water before water change or add directly into your tank during the water change itself. Add dosage for your total tank capacity, irrespective of the % water change you are performing.

29.07.2021

H**A

Wonderful product.

Works perfectly on fresh water. Fishes are quite healthy

28.04.2021

J**E

Good product, you get what you pay for!

The prime cleans up the slime! It is so divine, you'll certainly not mind the word on the vine is this stuff is sublime! Make sure to choose prime, for your brine!

7.09.2025

A**.

Super

Fonctionne très bien mon taux de ph a bien diminuer

14.12.2025

F**I

Kaliteli ürün

Tam bir fiyat performans ürünü

16.08.2025

E**O

Honnêtement de très bonne qualité et très utile

Ce produit a littéralement sauvé mon aquarium, j'avais fait l'erreur d'intégrer les Poisson avant de finir le cycle des trois semaines, et mon niveau de nitrite était assez haut, cela a vraiment permis à mes Poisson de survivre

14.12.2025

�**O

ممتاز

2.03.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

฿1143

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago