Seachem Stability Fish Tank Stabilizer – For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)
$16.68
Price: $16.68
(as of Oct 07, 2025 19:33:16 UTC – Details)
Seachem Stability Fish Tank Stabilizer – For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)
Is Discontinued By Manufacturer : No
Product Dimensions : 7.6 x 2 x 1.5 inches; 1.09 Pounds
Item model number : 123
Date First Available : June 20, 2004
Manufacturer : Seachem Laboratories, Inc.
ASIN : B0002APIIW
Best Sellers Rank: #2,178 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Aquarium Water Treatments
Customer Reviews: 4.8 4.8 out of 5 stars 12,550 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); } }); });
TANK STABILIZATION: Seachem Stability will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the #1 cause of fish death: “new tank syndrome”.
TREATMENT: Stability is formulated specifically for the aquarium and contains a synergistic blend of aerobic, anaerobic, and facultative bacteria which facilitate the breakdown of waste organics, ammonia, nitrite, and nitrate.
BACTERIA GROWTH: The necessary conditions for the growth of Stability’s bacteria strains encompass a very broad range. When other bacteria begin to die off (usually from high organic loads caused by the unknown death of an organism), Stability simply becomes more effective.
USE: Shake Seachem Stability well before use and turn off UV/ozone filter. Use 1 capful (5 mL) for each 40 L (10 US gallons) on the first day with a new aquarium. Then use 1 capful for each 80 L (20 US gallons) daily for 7 days. Fish and other aquatic species may be introduced at any time as long as dosage is maintained for 7 days.
Customers say
Customers find this aquarium stabilizer works well for establishing new tanks and adding beneficial bacteria. The product helps maintain fish health, with customers reporting they’ve never lost a fish, and one noting their planted freshwater tank is thriving. They appreciate its quick cycle time, with tanks fully cycled in three days, and consider it good value for money. While some customers report keeping ammonia and nitrites at zero, others mention ammonia levels don’t decrease.
13 reviews for Seachem Stability Fish Tank Stabilizer – For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)
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Wes F. –
I’ll use this every time I cycle a tank
I used this in combination with Prime to do an in fish cycle and it worked great. It gives you instructions on the bottle – to use for 7 days or something like that – but I just kept going with it while I slowly added fish and it worked great.I started with a freshly planted tank and all the levels were zeroed out (Ammonia, Nitrite, Nitrate). I would dose Prime and Stability and a pinch of fish food daily in the morning and run water tests at night. The logic is, Prime would safely neutralize any Ammonia for 24 hours (while keeping it available for beneficial bacteria as a food source) and Stability would ensure there’s enough beneficial bacteria to consume the available Ammonia and Nitrite.After a day or two, I added a few Guppies for their hardiness, hungry appetites, and large bioloads. In the meantime, I continued dosing Prime and Stability daily. 25% water change after a week with levels still good with some traces of Nitrate. A few Corydoras added to minimize leftover food from decomposing. Still dosing Prime and Stability daily. Fish thriving, plants thriving, and trace amounts of Nitrate. Kept dosing, but in somewhat smaller amounts, only using the recommended dose when adding fish. Months in, all is well with no deaths and a perfectly cycled tank.During the whole process I never saw any Ammonia or Nitrites spikes, even when adding fish. The Prime would keep Ammonia in check. And dosing Stability would make sure there’s enough beneficial bacteria to handle whatever levels are in the tank, even if it fluctuates. Great product! Definitely recommend as I do most Seachem products.
Ray C. –
Greatly speeds up the cycle
I used Stability to kickstart the cycle on a new tank and it worked faster than I expected. I dosed it daily for the first week like the bottle says, and by day 5 or 6 ammonia and nitrites were already dropping. I was also using bottled ammonia and keeping things consistent, but I do think this made a big difference. Water stayed clear the whole time and there was no weird smell or cloudiness. Iâve used a few other bacteria starters before and this one seems to actually do something right away. Might not be âinstantâ like some people say, but it definitely sped things up. Iâd use it again for sure.
Kay –
Great product for establishing a new tank
Great for establishing a new tank
Kelly Bunch –
Seachem makes the best beneficial bacteria in a bottle
I use seachem products on all of my aquariums, this is the best value for your money when it comes to water, cleanliness and water clarity. The size of this product helps with large aquariums and the smell is not that bad.
Patrick H. Van Cleave –
It keeps my nitrite in range.
It works exclent keeping my aquarium in exclent shape.
Henry Collado Maltez –
Excelente
Excelente producto
Christopher Lang –
It seems fine, but won’t cycle a biofilter like it claims.
I’m sure Seachem Stability works well to stabilize and maintain a biofilter as it’s advertised, but don’t believe the hype that it will instantly cycle your biofilter. Sure, it can help get things off the ground by seeding the filter media with bacteria, but don’t expect a colony of nitrifying bacteria in 24 hours or something ridiculous. When used with Seachem Prime you could probably reasonably perform a fish-in cycle in 7-10 days, but I’m in the camp that believes a fishless cycle with ammonium chloride and live plants is ideal. Having said that I found significantly better results using Fritz TurboStart 700 to kick off my nitrogen cycle. Stability didn’t get me any results after a week using their recommended loading dose and maintenance dose. I’m somewhat certain it actually gave me a surface biofilm that I’ve never experienced before when using it to start a nitrogen cycle.Once the cycle has kicked off, I’ve diligently used Stability to ‘maintain’ my biofilter by adding it with water changes and stocking new animals. It’s never given me problems, but it’s honestly difficult to gauge how well it performs as there’s no water test that can be done to see what kind of impact it makes to an already established tank. I suppose if you have a catastrophic crash in your biofilter or perhaps overload it you could measure its before-and-after performance with ammonia and nitrite tests, but thankfully I haven’t experienced anything like that. I’ll continue to use Stability, Prime, and Pristine in maintenance doses as suggested because as far as I know, it’s working as intended, and making changes to a stable environment is a recipe for disaster. I just haven’t had luck with it kick-starting the nitrogen cycle. For that I’d put my faith in Fritz TurboStart (or FritzZyme)
Metroman –
Happy
Works as described. Happy with the purchase.
Valerie Nederland –
Goede service.Na 2 dagen binnen zoals vermeld.
V –
I think my fish love it
Errrd –
Akvaryumlarda hızlı bir Åekilde bakteri tutunmasını saÄlayan ve balık ölümlerini önleyen bir kaç iyi markadan/üründen bir tanesi.
Amazon Customer –
Best product and brand.
Topteck –
“Seachem Stability: Gladness in the Water!” This powerful 2-liter tank has completely changed my aquarium. My tank is now perfectly balanced since I added Stability, and the fish seem happy and more vibrant. The liquid formula makes dosing very easy, and you can see effects in just a few days. It has worked well both when setting up the tank for the first time and when doing maintenance. Seachem Stability is now my go-to product for keeping water safe. It is a trusted companion for anyone who loves aquariums and helps keep the ecosystem healthy and thriving. A must-have for my fish-keeping routine!”