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Tetra

Tetra Algae Control Liquid, 3.38 ounces, Controls Algae in Aquariums

  • Based on 4,213 reviews
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Size: 3.38-Ounce


Features

  • CONTROLS ALGAE: Liquid formula effectively combats algal blooms that cause green water.
  • KEEPS GLASS AND DECOR CLEAN: Works against algae that grow on glass and decor, such as blue-green algae, brown algae, hair algae and blanket weed.
  • SAFE FOR PLANTS AND FISH: Safely use Tetra Algae Control formula in planted aquariums as directed.
  • USAGE: Use 1 mL for every 12 gallons of aquarium water.
  • APPLY IN THE MORNING: See product label for complete directions.

Description

Tetra aquarium products are dedicated to helping seasoned hobbyists and beginners alike enjoy a successful, life-long aquatic experience. Tetra products build fish-, reptile-and pond-keeping confidence, one innovation at a time. Our complete line of Tetra nutrition, water care, filtration and aquarium products are designed to meet the needs of all hobbyists and the fish they love. Tetra Algae Control™ formula controls unsightly algae in your aquarium. This liquid formula is highly effective against algal blooms that cause green water and algae that grow on glass and décor, such as blue-green algae (Oscillatoria), diatoms - “brown algae” (Synedra), hair algae (Spirogyra) and blanket weed (Oedogonium). Tetra Algae Control™ treatment is safe to use with ornamental freshwater fish and plants. See product label for complete directions and warnings. Before applying Tetra Algae Control™ treatment, first remove as much algae as possible by cleaning the glass and décor. This allows the product to be most effective at reducing the remaining algae and inhibiting new algae growth. Use 1 mL for every 12 gallons of aquarium water. Remove activated carbon filters for 6 to 8 hours after dosing. Be prepared to clean out additional algae as it is killed to prevent deterioration of water quality. See product label for complete directions and warnings. Broad Spectrum Algae Control:Tetra Algae Control works to combat algae and new algae growth in your aquarium. This highly effective formula is effective against green water (algae blooms), bluegreen algae, diatoms or “brown algae,” and hair algae or blanketweed that grows on glass and décor.Safe to use with Fish and Plants:Unlike other products on the market, Tetra AlgaeControl liquid can be safely used in planted aquariums. A precision dropper top helps you to administer the proper dose to your aquarium for safe and effective algae control every time.Tetra Sets the Bar high in Water Care and Maintenance TreatmentsTetra sets the bar high in water care treatment and maintenance with a four-step, color-coded system. From aquarium start-up and routine maintenance, to trouble shooting solutions and testing, Tetra offers everything you need to keep your aquarium water healthy. Take a look at the chart below to see the full line of Tetra water care treatments. New Aquarium? Tetra SafeStart allows you to safely add fish to your tank immediately. Use AquaSafe whenever adding water to neutralize chlorine and heavy metals. Use EasyBalance weekly to keep your water chemistry balanced. High ammonia? Use AmmoniaSafe liquid or tablets. Cloudy water? Clear it up with WaterClarifier liquid or tablets. Algae issues? Keep in check with AlgaeControl liquid or No More Algae tablets. Tetra EasyStrips make regular water testing a breeze.

Brand: Tetra


Liquid Volume: 3.38 Fluid Ounces


Item Weight: 4.56 ounces


Item Form: Liquid


Number of Packs: 1


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1.25 x 2.25 x 4.75 inches; 4.56 ounces


Item model number ‏ : ‎ 77184


Department ‏ : ‎ Unisex-Adult


Date First Available ‏ : ‎ August 29, 2008


Manufacturer ‏ : ‎ Tetra


Best Sellers Rank: #52,108 in Pet Supplies (See Top 100 in Pet Supplies) #469 in Aquarium Water Treatments


#469 in Aquarium Water Treatments:


Customer Reviews: 4.2 4.2 out of 5 stars (4,213)


Brand Name: Tetra


Manufacturer: Tetra


UPC: 046798771845


Global Trade Identification Number: 45


Model Number: 77184


Manufacturer Part Number: 77184


Unit Count: 3.38 Ounce


Warranty Description: See label


Item Type Name: Tetra Algae Control Liquid, 3.38 ounces, Controls Algae in Aquariums


Included Components: Tetra Algae Control Liquid, 3.38 ounces, Controls Algae in Aquariums


Liquid Volume: 3.38 Fluid Ounces


Item Weight: 4.56 ounces


Item Form: Liquid


Target Species: Fish


Allergen Information: Abalone Free


Frequently asked questions

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Top Amazon Reviews

    • It really works
Size: 1.69-Ounce
I couldn't get rid of the green water. Algae was growing on everything. I scrubbed and did water changes every two days and modified all the feeding and lighting so no effect. Finally broke down and got this stuff. Worked great. Aquarium is clean and water is crystal clear. Directions state 1 ml per 12 gallons. I have a 40g breeder tank which would have been over 3 ml. Decided to error on the side of caution and only put in 1.25ml which was plenty. And only 1 treatment. One molly did die but I don't think it was due to this as she was already starting to look a little sick before I even treated the tank. ... show more
Reviewed in the United States on August 4, 2025 by must read daily
    • It works wonders!
Size: 3.38-Ounce
Do not pay attention to those negative reviews. I have a 55 gal fish tank that would get worse and worse, no matter what I did. I do a weekly gravel clean (got a couple goldfish) and a weekly 20%-25% percent water change but the water would continue to get worse and worse. It got to a point where I couldn't even see the thermometer in the back or the fish swimming at the rear. The water was a yellowish, a greenish, and a brownish mixture. Something drastic had to happen so I went online, bought this product, and read and re-read the instructions. Common sense and following the manufacturer instructions are vital for this product to function properly and safely. You need 1ml for every 12 gal. You cannot use this in a aquarium that has been established for less then 3 mo. You need to add this in an area where there is a lot of water movement or you need to dilute it in a cup of aquarium water. Since this was the first time I was using this product I decided to dilute it in a cup of water in case I made a mistake. One teaspoon is 5ml so I used that but didn't fill it all the way (if I did it would have been for 60 gal and mine is 55). I did a quick gravel clean up (5 gal removed) and a quick interior glass wipe, and before I put in the new water I put in the pre diluted tetra algae control. Then I poured in my conditioned water, sat down to watch some football, and hoped for the best. It took around 5 hours for me to see hints of the blue background plus 3 more hours for me to read the numbers on my thermometer. By this time it was 1 am so I went to bed and woke up to a beautiful fish tank. The water was crystal clear. My fish were swimming normally and not one has died since. I was thinking that I'd have to do up to 3 doses to get rid of all the algae, but all it took was one to bring back my aquarium to perfect condition. Other reviews claimed that this made their tank cloudy or worse but I did not notice this because my water was already horrible. Please give this product a chance. For all you that are leery about "positive payed" reviews don't forget that companies also pay people to leave negative ones on their competition. Do as much research as you can and read reviews on other major sites that sell the same product. Follow the directions to a T and you won't regret it. ... show more
Reviewed in the United States on December 16, 2013 by Melody
    • 100% works but might be a bit harsh
Size: 3.38-Ounce
We have a small 5 gallon portrait fish tank that gets enough natural light shining on it that algae has been a problem. I’ve done regular water and filter changes but it turns green again in a day. I put only 4 drops in the tank to start and that might have been too much! The water turned crystal clear and clean very quickly but it seemed to affect our snail. At 1 drop a month this one bottle will last years! Very well packaged and looks great. ... show more
Reviewed in the United States on November 13, 2023 by Andrew Jensen
    • Does the Job
Size: 1.69-Ounce
Clears our a lot of the murkyness.
Reviewed in the United States on May 12, 2026 by Aquinod95
    • Good
Size: 1.69-Ounce
It is great for cleaning and shining the fish tank, no bad smell, non of my fishes died or turned weak after using it, works very fast withen 2_4hours you can start see results, cheap price, safe for plants , not bad size.
Reviewed in the United States on June 5, 2026 by Mohammad Altaani
    • Not effective against green water when used as dirrected.
Size: 3.38-Ounce
This product claims to work against green water algae, which is actually phytoplankton by the way. I used is as directed making precise measurements with a syringe for the maximum of 3 doses over 9 days. It appears as though the green water problem has actually gotten worse. I cant say if it had any effect on other algae since I cant see it through the green water. Also, fish did appear lethargic and oxygen deprived for the first 4 hours after each treatment, but eventually came out of it. The tank has good circulation and aeration. I only had the lights on a few hours a day because that's supposedly supposed to help as well, but it didn't seem to help at all. Update: I wasn't concerned with getting rid of the hair algae because my goldfish seem to like eating it, however I thought maybe the treatment wasn't working for the green water problem due to there being too much algae, so I cleaned most of the algae off the glass and did a couple nearly 100% water changes until there was no sign of green water. I then repeated the 9 day treatment as directed while reducing the light cycle to lass than 6 hours per day, just enough to keep the plants alive. Once again, the fish were stoned for a couple hours after each treatment and it this time it killed the cycle in my tank. The water was already like green Gatorade again by day 9. It looks like the traces of hair algae I missed are still alive as well, though that was not my target. ... show more
Reviewed in the United States on November 19, 2019 by Seth
    • Be very careful when using this product!
Size: 3.38-Ounce
I suddenly had major green water that you couldn't even see the fish from algae!! My tank is by a large glass window which unfortunately doesn't aide in the algae prevention. I could not get rid of it so i tried this product. Tetra is typically the BEST brand in aquatics however, even when following the instructions, after a water change, my tank was back to green again where I literally could not see my fish 3 days later so I followed the directions and added more rather than cycling the tank. Sadly I found one of my parrot fish dead three says later when I decided to finally do a 3/4% where change to get rid of as much as possible. This product is not safe when used as recommend! Very disappointed in Tetra right now! Upon looking further into this product since it has safety warnings all over it it actually ELIMINATES OXYGEN in the tank! I do not recommend using this every 3 days as recommend on the bottle. Instead, I suggest cycling the tank about every 4 days depending on how bad your situation is, adding a good quality water conditioner using same temperature water and adding it to the tank again. That seems to be working for me so far. Also be sure when you use this to change the filter every time you cycle the tank or change the water no matter how new the filter, this will help eliminate the old algae from flowing through the filter again and putting it back in the water. Also be sure to scrub ALL decor in the tank, as well as the walls of the tank. I am even considering replacing some of my gravel but not all as its important when cycling a tank or setting up a new tank to leave some old gravel in as it contains healthy bacteria that the fish need. In conclusion, its just better to cycle the tank every 4 days or so, add same temperature water with conditioner and use recommended dose of the algae remover rather than keep adding it every 3 days. Cycling the tank does no harm... some fish breeders even do it every 1 to 2 days. Also some fish are more hardy than others so just he careful, knowing about your fish and how hardy they are can help tremendously! Hope this helps! ... show more
Reviewed in the United States on April 23, 2021 by Babbosbm
    • It Cleaned the Water in My Tank
Size: 1.69-Ounce
It works! What more can I say. It would be nice if squirt top was more easily removed, or an easier method for measuring the amount dispensed into the tank. I removed it so that I could use an eyedropper having an "ml" scale.
Reviewed in the United States on March 19, 2026 by Buck

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