This material is excellent for fast cycling. I am constantly optimizing the systems and the fish can enter within 12-14 hours without any problems. I'm not sure why the bad reviews. Maybe they didn't dose correctly, or you need to dose equal parts Ammo-Stop and Biodigest (both in this pack). Read on the bottles. You are marked. If it says 6 vials, use 3 ammo plugs, 3 biodigests. This product absolutely works. I strongly believe this was abused in bad reviews. 100% unbiased, independent review. I use just enough of this and other products to know what really works when used correctly.
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