Aquarium owners, if you're battling that annoying red, black, or blue-green slime in your tank, this Ultralife treatment is what you need. This 3-pack of .71 ounce bottles gives you plenty to tackle stubborn cyanobacteria stains that just keep coming back. The formula uses natural cellular matter and biological accelerators that actually work without harming your fish or coral. Safe for both freshwater and marine tanks, which is pretty awesome. Just remember to keep protein skimming going during treatment - you might need to adjust it slightly though. I've used this stuff for years and it consistently clears up those ugly stains without crashing my tank's biology. Seriously, if you're tired of scrubbing and water changes that don't solve the problem, this treatment gets to the root cause. The bottles last a good while too - a little goes a long way. Just keep it away from kids and only use in aquariums, obviously. One of those products that actually delivers what it promises without any drama.