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💦 Clear water, happy fish, zero hassle — your pond’s new best friend!
API POND SIMPLY CLEAR is a 1-gallon liquid clarifier designed to rapidly clear cloudy freshwater ponds by aggregating suspended particles and breaking down sludge with beneficial bacteria. Safe for fish, plants, pets, and wildlife, it requires bi-weekly application for optimal results and is backed by over 50 years of API’s aquatic care innovation.



















| ASIN | B001V9OPZK |
| Allergen Information | Apple Free |
| Best Sellers Rank | #13,670 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #42 in Water Garden & Pond Treatment |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.3 out of 5 stars 2,768 Reviews |
| Global Trade Identification Number | 00317163032480 |
| Item Form | Liquid |
| Item Type Name | Pond Water Clarifier |
| Item Weight | 0.08 kg |
| Liquid Volume | 128 fluid ounces |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 248C |
| Model Number | 248C |
| Number of Items | 6 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163032480 |
| Unit Count | 1 Count |
M**K
Great product
The water in my small pond was completely green. The old goldfish weren't happy. I wasn't sure anything would clear it up. Tried this product per the recommended amount. Didn't really noticed any improvement. Decided to double or even triple the recommended amount. The pond started clearing up within two days. Kept adding small amounts and now the pond is crystal clear. I can tell the old goldfish are happy again. This stuff worked wonders on my pond, but needed extra large dose to get it started.
R**O
Clear is so much nicer to look at them slimy green!
We have a lovely man-made waterfall and pond in our backyard that we worked hard to install and we love to sit by at night and play trivia by, but I have to admit it’s much nicer with clear water coming down and a clear pond as opposed to green slimy water is product keeps it that way, and I’m happy to use it instead of trying to keep slugs live in the Great Northwest where are you? Never know from minute to minute when it’s going to snow and I don’t want to torture, poor little slugs, in cold weather! I’d rather use this pet, safe animal, safe product that does the trick!
T**S
Works
Helped my pond by following instructions. Would recommend.
J**N
Works great!
We have a small pond in our backyard that is about 600 gallons. It gets direct sunlight about 8 hours a day. This product keeps the water crystal clear.
A**D
A Fish Keeper's work is never done, but API Products help.
I have used almost all of the API products since we started keeping koi almost a decade ago. All the API products can be used together, if you have multiple issues. You need to be sure you are treating your problem with the right product at the correct dosage. That is why API has a product for every type of problem and explicit instructions. We have expanded several times, and we now have a 10,000-gallon pond. In our system we have a pump, filter, UV light, 2 bottom drains, a skimmer, and a sediment tank. I take water quality measurements every week, and occasionally issues will arise, even though we have a great system. By now you might be thinking I have stock in the API company, and maybe I should. I only recommend their products because this is what I have found works over trial and error. First, be sure you have the correct product for the problem. I have actually used this product once before, and thought it didn’t work. The reason it didn’t seem to work is I was not using the correct product for the problem at that time (this was in my early days in keeping koi). I needed API Ecofix (see my review if you are having issues with Nitrates and sludge), not Simply Clear. There is a subtle difference between the 2 products, and deciding which is best can be confusing as the descriptions use some of the same words. I’m using Simply Clear to clump particles and reduce the phosphate in the pond. I know the pond has a phosphate problem from testing the water. Definitely test the water before you put in a product, so you know how drastic your problem is at that moment. Second, no matter what product you are using, be sure to have an accurate measure of how much water you have in your pond and follow instructions for the correct dosage. Most people make mistakes in dosage because they don't know the volume of water in their pond. There are websites that help you calculate your pond volume that are easy to use. Many people don’t realize how the smallest increment of wrong dosage will negatively impact the results and possibly their fish. Third, use the product for the correctly length of time. Most products for your pond, no matter your problem, are not one and done. Using some products for fish is like humans taking antibiotics…you might need to dose more than once and finish out the entire length of time for dosage. This product requires you to dose your pond twice a week for two weeks until you get to the maintenance dose. You are building up a colony of beneficial bacteria with this product. Hopefully, reading this review is helpful to you and your fish. Feel free to ask me questions.
B**O
Leaves water milky
I've tried many different products and this is my least favorite
M**M
Worked well
I removed the pond heater , scooped out some string algae, divided the bottle into 3 doses ( not sure of pond size , maybe 3-500 gallons . After the third dose the water and rocks at bottom are pretty algae free and a Bull Frog has been hanging around at Night. Of Course spring came … I Prob left the Pond heater in too long maybe ? Birds enjoying the water as well as two Deer
N**Y
So far it is working better than anything else has!
With a 2000 gallon Koi pond, I have tried almost every pond product made. I do use the Algae treatment that works well, but I needed something else to dissolve debris like leaves in the pond that I was unable to scoop out from the bottom. I use this regularly, and it all looks great. I can't enjoy the pond and fish unless I can see them and feel that it is as clear as possible. Simply Clear has done the trick so far. We will see as the weather gets hotter, but as long as I backwash and use Algae treatment, this is the perfect extra product.
K**1
API pond clarifier
Have used this before and does great job of clearing cloudy water in our ponds
A**T
This works
It worked.
D**T
Manque de mode d'emploi en français
Dommage qu'il n'y a aucun mode d'emploi en français
C**.
Pond additive for clear water.
This stuff is amazing!! Keeps our pond and water fountain water so clean and clear. Will buy again
A**Y
Great product
Great and nice to have a natural product to keep the pond healthy!
Trustpilot
2 weeks ago
2 months ago