Seachem Stability - For Freshwater and Marine Aquariums 250ml

Added as directed. Did not work. Might as well have bought a big expensive bottle of fancy water. Product may have been compromised somehow, but certainly failed to establish biofilter. Waste of money. Tetra Safestart actually worked however, to my surprise.

Ive never seen anything cycle a tank faster.

Love this product. I use it weekly with every water change. I have goldfish and this product has helped tremendously keeping my tank stable. I love seachem products and would never use anything else.

Was on time as advertised

I soaked filter media in it, added as directed, and cycled a 75 gallon tank in 4 days. Tested water everyday because when you buy something alive, its possible that its dead from whatever happened to it before you got it. Over a month later, my tank is still cycled. Be smart, and test your water everyday if you are keeping fish in tank that isnt cycled, no matter what fast cycling product you use

I cycled two aquariums in 7 days and I am a total newbie. I used it in conjunction with prime, fish in cycle.

I would give this more stars, but the thing is it worked so well initially that i never needed to use it but once (making it pretty expensive for a small application). Use as jumpstart for new tanks or full water changes (?). The Biofilter is important for clean and efficient water cycles, this keeps levels in check, and my fish seem happy.

This product is pretty amazing. I was stuck in the middle of a fishless cycle where ammonia was getting converted to nitrite but the nitrite wouldnt budge. I didnt get any nitrates for 2-3 weeks, maybe more. I did a huge water change and still no change in nitrite. I put stability in and 3 days later, I got 0 nitrites and a ton of nitrates.

I have been experimenting with different biological filter starters and so far this one is the worst of them. Ive been through Jungle Start Zyme (Walmart), Seachem Stability, Tetra Safestart, and Nutrafin Cycle. All of these products seem to have decent Ammonia->Nitrite (Nitrosomonas) bacteria, but only Tetra Safestart and Nutrafin had effective Nitrite->Nitrate (Nitrobacter) bacteria. In fact, I was able to get a pretty solid cycle going on day 3 with Tetra Safestart. Stability had very little effect overall and the bottle is perfectly within its shelf life. Not impressed.

Helps keep those nitrates and nitrites down but be patient as it takes time for the bacteria to grow in new tanks!