API Stress Zyme - 237ml
API Stess Zyme 237ml API STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle. Making STRESS ZYME bacterial cleaner part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums. Description Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an aquarium. For use in fresh and saltwater. Instructions Add 1 tsp. per 10 gallons of water weekly.
API Stess Zyme 237ml API STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle. Making STRESS ZYME bacterial cleaner part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums. Description Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an aquarium. For use in fresh and saltwater. Instructions Add 1 tsp. per 10 gallons of water weekly.
API Stess Zyme 237ml API STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle. Making STRESS ZYME bacterial cleaner part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums. Description Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an aquarium. For use in fresh and saltwater. Instructions Add 1 tsp. per 10 gallons of water weekly.
API Stess Zyme 237ml API STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle. Making STRESS ZYME bacterial cleaner part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums. Description Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality. No refrigeration necessary. Use when setting up and maintaining an aquarium. For use in fresh and saltwater. Instructions Add 1 tsp. per 10 gallons of water weekly.
in 37 offers
The lowest price for API Stress Zyme - 237ml right now is $7.00 at Swaggle, compared across 36 retailers.
The all-time low was $6.00 on 3 Oct 2025 — today's price is 17% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 10 May 2026.
Last updated at 10/05/2026 14:08:36
API Zyme Water Treatment, 237 ml, (Pack of 1), 56D
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
API Stress Zyme Freshwater and Saltwater Aquarium Water Cleaner, 237ml
Delivery between 13–22 May $6.95
API, Stress Zyme Plus Aquarium Cleaning Solution, 8 oz (Treats 480 Gallons)
Delivery $19.45
API Stress Zyme Freshwater And Saltwater Aquarium Water Cleaner 237ml
Delivery between 13–19 May $6.31
API Stress Zyme 237ml – Aquarium Bacterial Cleaner | Aquaristic Online
Delivery $14
API Stress Zyme 237ml
Delivery between 19–20 May $10.91
API Stress Zyme 237mL
Delivery between 15–20 May $8.95
API Stress Zyme 237ml Improves Biological Filtration - Reduces Sludge | The Tech Den
Delivery $9.50
API Stress Zyme Bacterial Cleaner for Freshwater and Saltwater Aquariums - 237ml Bottle
Delivery $7.95
API Stess Zyme 237ml
Delivery between 13–21 May $7.44
originally posted on thetechden.com.au
Works very well. It keeps my tank clean as I have one very large goldfish! plus two smaller fish.
originally posted on petco.com
Have been using this for a year and will not change. The fish seem to like to swim in it when I add it to the tank...like they are taking a shower. And I have had very few deaths since starting this and two other API products when adding water, making water changes, or adding fish. Newborns in both tanks are doing well too.
originally posted on thetechden.com.au
This product is a weekly 'top up' dose of bacteria essential to healthy aquariums, and combats toxic ammonia and nitrite build up. The bacteria also break down organic sludge. A general tank health product, it can reduce the stress on water chemistry caused by medications that damage beneficial bacteria colonies.
| Product dimensions | 25.4 x 25.4 x 25.4 cm; 283.49 Grams |
| Country of origin | USA |
| Is discontinued by manufacturer | Yes |
| Liquid volume | 8 Fluid Ounces |
| Item form | Liquid |
API Zyme Water Treatment, 237 ml, (Pack of 1), 56D
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
API Stress Zyme Freshwater and Saltwater Aquarium Water Cleaner, 237ml
Delivery between 13–22 May $6.95
API, Stress Zyme Plus Aquarium Cleaning Solution, 8 oz (Treats 480 Gallons)
Delivery $19.45
API Stress Zyme Freshwater And Saltwater Aquarium Water Cleaner 237ml
Delivery between 13–19 May $6.31
API Stress Zyme 237ml – Aquarium Bacterial Cleaner | Aquaristic Online
Delivery $14
Works very well. It keeps my tank clean as I have one very large goldfish! plus two smaller fish.
Have been using this for a year and will not change. The fish seem to like to swim in it when I add it to the tank...like they are taking a shower. And I have had very few deaths since starting this and two other API products when adding water, making water changes, or adding fish. Newborns in both tanks are doing well too.
This product is a weekly 'top up' dose of bacteria essential to healthy aquariums, and combats toxic ammonia and nitrite build up. The bacteria also break down organic sludge. A general tank health product, it can reduce the stress on water chemistry caused by medications that damage beneficial bacteria colonies.
Generous size bottle. Fast shipping. Water looks clearer and more active fish.
If I could give zero stars I would! I bought this yesterday and put the amount directed in my saltwater tank. It was supposed to "lower the ammonia and nitrates." After 3 hours, I went and checked on the ammonia and nitrate levels to find that there was no change whatsoever. So , I doubled the dose, waited till morning, and STILL NOTHING happened! Waste of money. Instead, buy Seachem Purigen. It works 100%, while API STRESS ZYME+ does NOTHING!
I use Stress Zyme in my tank. I just happened to stumble upon this website & I searched for it & they had it. This is a great size bottle & it should last for a while. Company was fantastic, shipping & received very quickly & the price didn’t break the bank. Totally recommend this company & will definitely order items from them again. A+++ 😀
Great for cleaning gravel etc. we have a 29 gallon tank with many different tropical fish. Will turn things white initially likely due to good bacteria but goes away as part of process
I am getting back into my tropical fish hobby after almost 8 years and I must say I forgot about letting my aquarium go through the cycle process. I bought fish after 2 days of the aquarium running and it went into a bacteria bloom. It got really cloudy so I had to do so some research after finding out that after buying solutions to clear your water will not solve the problem.I saw this product on a youtube video and went out right away to purchase it. My aquarium cleared up in 2 days. Now it has been cycling for 3 weeks and I have been running daily water test and everything is good. Fortunately I only added 2 fish, but they are doing quite well and my water is crystal clear. What I did was double the recommended dosage each week.
I always recommend Indiefur above every other seller as they sell genuine product at right market price, unlike any amazon or flipkart seller who sells the same product at a higher MRPs then the original market price. Also the delivery is fast & well packed. They take care of the cuatomer preferences & they deliver the product fast & seamlessly. Good work Indiefur team. Thank you!!
I ordered twice from AquariumKingdom. The first is Stress Zyme and Stress Coat, and the second one is API Bettafix. These things make changing water easier for me and help to improve my fish's health. However, I'm not too sure if the BettaFix helps cure my fish's popeyes. I change the water every two days before the BettaFix treatment, but nothing happens. After the treatment, my fish's eye colour changes, but the swelling decreases a bit after two days Anyway, the products come in good shape and good packaging. Fast delivery. Will order again if I need anything for my fish.
| Product dimensions | 25.4 x 25.4 x 25.4 cm; 283.49 Grams |
| Country of origin | USA |
| Is discontinued by manufacturer | Yes |
| Liquid volume | 8 Fluid Ounces |
| Item form | Liquid |
