I love stability, it helps a great deal with fish-in cycling of a tank. I had my 10 Gal cycled in less than a week. It's an alternative to Tetra Safe-Start which is not available in Canada which is why I tried this one. Other beneficial bacteria supplements I have tried have lead to ammonia or nitrite crashes after a couple months which is a big hassle. I highly recommend to those who want to quick cycle a tank.