Tetra Water Clarifier, Aquarium Treatment Solution, 8.45 oz, Clears Cloudy Aquarium Water, Safe to Use with Fish and Plants, For Fresh Water
$8.99
Price: $8.99
(as of Oct 14, 2025 13:19:28 UTC – Details)
Tetra WaterClarifier clears cloudy aquarium water caused by overfeeding gravel dust and other minute suspended particles This phosphate-free liquid solution is safe to use in all freshwater aquariums This effective formula works by causing small suspended particles to quickly clump together These larger particles are then removed during normal power filter operation This formula is based on clarifiers used to treat drinking water It’s safe to use with fish and plants and will not affect water pH levels in your aquarium Unlike many clarification products on the market Tetra WaterClarifier is safe for fish even in very soft water (low KH) conditions However in extremely low KH conditions below 1KH half dosage is recommended If in doubt about your water’s hardness perform a 20% water change before treatment Be sure to use Tetra AquaSafe water conditioner for each partial water change and Tetra EasyStrips Test Strips to measure your water’s hardness 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
Is Discontinued By Manufacturer : No
Product Dimensions : 1.63 x 3 x 7 inches; 8.32 ounces
Item model number : 77136
Department : Unisex-Adult
Date First Available : June 20, 2004
Manufacturer : Tetra
ASIN : B002DVWSVI
Best Sellers Rank: #11,107 in Pet Supplies (See Top 100 in Pet Supplies) #87 in Aquarium Water Treatments
Customer Reviews: 4.5 4.5 out of 5 stars 3,686 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
FOR FRESHWATER aquariumS Quickly clears cloudy or hazy water caused by overfeeding gravel dust and other minute suspended particles
CLUMPING ACTION Causes small suspended particles to quickly clump together to settle or be removed during normal power filter operation
WORKS ON SOFT WATER Safe for fish even in very soft water (low kH) conditions
USAGE 1 teaspoon treats 10 gallons of water
Included Components: Tetra Water Clarifier (8.45 Oz)
Customers say
Customers find the water clarifier easy to use and appreciate its value for money. The product receives positive feedback for its quality. However, customers disagree on its effectiveness, with some reporting it cleared their tanks while others experienced cloudy water. Moreover, fish health is a concern, with some customers reporting their fish died after using the product, though others say their fish were fine.
13 reviews for Tetra Water Clarifier, Aquarium Treatment Solution, 8.45 oz, Clears Cloudy Aquarium Water, Safe to Use with Fish and Plants, For Fresh Water
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Carl –
Wow! Talk about fast acting!
I’ve had a Fluval Edge six gallon aquarium for decades, like since whenever they first went on sale. Years ago I had huge tanks. No more. I am good with my fish. Few deaths. Lots of fun. Last November I decided that as the New York City area was collapsing, I’d sell my house and move to Arizona. That evolved donating my Cherry Barbs to the local aquarium store, emptying my tank and moving.It took me awhile to set up the tank again but when I did, I bought more Cherry Barbs in the local pet store. All was well for a short while until one of the newly arrived Cherry Barbs died behind a rock. By the time I found it, it was pretty well decomposed. I got it out of the tank, changed the filter stuff and did a 1/3 water change. At some point the water began to cloud and no amount of water changing or filter cleaning could clear it. I can only suggest it was the dead barb that started this cloudiness off. Can’t say for sure.Anyway, something had to be done so I read reviews of all the aquarium water clarifiers on the market and decided to give Tetra a shot. It seemed the least toxic.I was determined not to over do it. Six gallon tank minus room for gravel, a rock and a fake plant. If a teaspoon is the right amount for a ten gallon tank, I figured I’d try half a teaspoon for this one. I measured, I dumped an I hoped for the best.An hour later the water was totally clear and the fish are fine! It’s like a different tank. I’ll give it awhile and later today I’ll clean out the filter.This stuff is HIGHLY recommended by me.
Stef Prentice –
It works!!
Completely cleared up the water in a 40 gallon tank in less than 2 hours – will buy this again!
Hector Aleman –
Tetra water clarifier. Not harmful to fish
This tetra water clarifier truly works great and helped to clear up my fish tanks water in 2 applications. The bottle is easy to use and the direction for proper use is labeled on the bottle.
Amazon Customer –
Works well
Easy to use but does seem to make crystals in tank.
wayne –
Works great.
Easy to use.
Arnie B. –
Added it to my 60-gallon tank – before and after pictures
Berfore: My tank is cloudy, probably from having its light on too much, from overfeeding and from algae. When I remove algae with a sponge and a scraper it’s going to float and mess up the water a little. Did a 25 percent water change and put new Poly-fill in my Seachem Fluval 75 HOB filter. Then this evening at 7 pm I took a picture and added 30 ml of Tetra Water Clarifier to the water. (That was easy to do because the bottle has a very small opening and there are raised lines on its side each indicating 10 ml. So I kept pouring until the level was down three lines.)AFTER: It’s five days later. After 48 hours I did a 25 percent water change and added another 30 ml dose. Then 48 hours later a third dose, changing my Poly-Fill filter, which had already tra[[ed much fine “stuff”. IT WORKED! (see third picture) Tank is much clearer. But not “crystal clear” No fish were harmed. So I give it five stars.Cloudiness can have many causes and can be hard to deal with. Epecting this one inexpensive solution to do the whole job in most cases isn’t realistic. In my case, I know there is more for me to do. Partial water changes more often. Less food. Leave the light on much less. It may be a bacterial problem and my HOB filter’s bag of biological pellets may have been messed up (out of the water too long) a few weeks ago. Extreme water changes could be the wrong thing to do. It may clear up in another week or two. Patience.
granma –
Works
Good quality product. Works great in my aquarium.
P Shif –
Will clear water but needs a little help
This is a fairly inexpensive product that really works and helps to have particles bind together to be big enough for the filter to grab. I had nothing bad happen to my plants or livestock using it, including fish, snails and shrimp.Keep in mind this will make the water very cloudy at first but this goes away within 24 hours. Also understand that for this to work some kind of polishing pad will be needed in the filter. A coarse sponge just isn’t dense enough to trap the particles even with this product. Buy something that can be cut to size and either placed in the bottom of a canister tray or cut to the size of the plastic on a HOB filter. Just cut off the filter pad on a used one and put this on instead when needed.One more thing to remember is this will bind up floating algae and if it is dead it can be removed. Green algae clouding the water will reproduce faster that it can be removed so you have do deal with that and let this and a polishing pad clean it up. Usually a UV sterilizer will work to kill it and it won’t come back as much once the tank matures and nitrates come down.It is good to keep on hand for times when people are coming over and you want the tank to be clear to show off!
Juan A. –
Cumple su funcion
JBXS –
Un poco de este aditivo y tu agua se nubla para que a las pocas horas esté muy clara.
JOSÃ EL COMPRADOR –
Buen producto, el problema que no viene en español, pero sin problema para sus instrucciones.
CRISTINAIBAÃEZ –
Esta bien , pero se tarda mucho en clarificar el agua , un dÃa mas o menos . Después queda muy bien
Francisco Manuel Ruiz Neira –
Excelente producto aclara rápidamente el agua