Seachem Stability Fish Tank Stabilizer - For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)

(936 reviews)

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$18.49

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(10000 available )

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63 Ratings
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Reviews
  • NateRosa

    Greater than one week

    Its the only seachem product aside from prime incan vouch for

  • Jeremiah Michael Leedy

    > 3 day

    To clarify this is what you use to start the bacterial cycle in a new fish tank and boost an already established tank. It is used to help break down solid waste in a tank and help prevent bad bacterias from developing. I just started a 55 gallon tank with 10 two year old goldfish and we all know how dirty those fish are... I started my tank with this bio bacteria and it works great. You shake the bottle and you hear some carbonated fizzing from the active bacteria and pour a few caps of this directly into your filters to start the process and it will keep your fish from dieing because of New tank syndrome IE all your fish die a horrible death because of chemical spikes. This stuff works miracles in helping to break down solids quickly and keeping fish healthy. It will make your water milky for a day or so because of a HEALTHY bacterial spike and then it levels out and the balance is found naturally. It is the best thing you can buy for a healthy tank and healthy fish. I can not sing the praises of this enough. Totally hooked on Seachem Stability for life. If you have a 55 gallon tank or bigger buy 2 of the 500ml bottles because I wish I did. I used 1/4 of a bottle in a week starting my tank and its a good idea to put a cap full in your filters after you wash them to get the bio filtration action going again. So over a year you will definitely use up a whole bottle maybe more depending on how much you feel you need it. And if you suffer a disaster and have to do a total water change you need this to keep your fish alive in a non established tank.

  • Pat Walsh

    > 3 day

    I was starting a new tank and did some research on how to get through the first cycle faster/easier, so I found this. I started a 20g fresh water,heavily planted tank, and threw this in along with seachem Prime. I let the water sit for 1 day, then went and got 9 neons and some more plants. dosed with Stability daily through the first month. Never lost 1 fish. I tested weekly and everything was staying A-OK, so on the second week, which is when it would normally be most dangerous - I even went and got some shrimp because i felt like the water was safe. So it has been 1 month and I never lost anything and tank is thriving. Plants are growing (thanks to plant lights and co2) Not sure if i can attribute this 100% to Stability - but I would do it the same way again and I would not start a tank without it now. Im continuing to dose with it daily for now.

  • ELeonard

    > 3 day

    I always have my seachem products stocked at all times. Ive in an emergency had to cycle a 60g Adult African Cichlid tank and had no casualties, thank goodness. One thing I do want to make clear, this will not instantly lower Ammonia, Nitrites or Nitrates. Stability helps by shortening the time it takes for your tank to cycle. In order to keep your readings down and your fish alive, ANY Fish, you must also use Prime. Prime does not rid your tank of Ammonia Nitrites or Nitrates but binds them so they are not toxic, for roughly 48hrs. So please do not buy this product thinking it will keep your fish alive. It is one of a combination of products that will or do.

  • Marcin Lech

    > 3 day

    great product

  • Elijah Stephens

    > 3 day

    As someone that is very serious about the fish keeping hobby, Seachem products are my go to. Seachem makes fantastic products that actually work, are consistent, and readily available in stores for the most part. Make no mistake, Seachem Stability is a 5 star product. Seachem Stability along with Prime really do make it possible to go from new aquarium setup to stocked with fish the same day. No more sitting around for weeks even months while a tank naturally goes through the nitrogen cycle. Ive used this method a few times when setting up new tanks and have not a lost a fish from adding them in a tank to soon yet. Seachem stability can also be used when adding new fish to established aquariums to give the beneficial bacteria in the tank a boost to help with the additional bio-load. I also use it whenever I do tank maintenance, because that is when you are most prone to killing the good bacteria in the tank and filters. The reason why I gave this 3 stars instead of 5 has nothing to do with the product itself. Like I said Seachem stability is a 5 star product. I usually by it in my local fish store but chose to order it from Amazon for the first time along with some other items I was ordering. I received a bottle of Stability that had expired about 3 years ago. I understand mistakes are made and things get overlooked, but how do you overlook something thats been expired for 3 years. To me that is no simple mistake, rather just pure negligence. I will never order anything that expires from amazon again.

  • Barbara Martin

    > 3 day

    Helped me to get my aquarium ready to add fish once the product helped to cycle my tank

  • B&B

    > 3 day

    I ordered seachem prime and seachem stability at the same time to do a fishless cycle. It is now going on 3 months and after dosing with the stability everyday, dosing liquid ammonia when needed up to 3-4ppm( janitorial strength from ACE with no scents or additives), prime when adding new water, a heater bumped up to 84 degrees, having live plants and a few old filters and same baggies of gravel from an established tank I still have NO progress and my Ammonia will not budge. It is completely bewildering. I have a 29g tank and have followed the instructions- I have nearly finished the whole giant bottle of Stability I received with no progress in my cycle at all. I have reached out to customer service with SeaChem and they have not been helpful- they just told me it was because I have 2 sponge filters instead of a hang on the back filter which is total crap- you should be able to cycle a tank with any kind of filter so long as it is the right size for the tank.. ( although they are very nice). I do not recommend this product at all. Maybe I got a bad batch but I am pretty disappointed and really feel like I have wasted my time and money.

  • Mary Hamel

    > 3 day

    I love my fish and was worried because the water was a bit yellow. This product helped stabilize the water.

  • buttersh

    12-04-2025

    Works well

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