I never thought I'd be so excited to see bacteria! I started with my cycle 2 weeks ago & my ammonia is finally dropping!! I had bought some of Dr Tim's Ammonia, and had dosed the tank w/ 29 drops, as instructed on the bottle. It brought my ammonia level to 2.0, as it stated it would. (Oops - it was only after that, that I read the one guide here that said to dose to 1.o!) I dosed Seachem Stability at the amount the bottle said to use. First four days, the ammonia stayed at 2.0 no question. I dosed the recommended amount of Stability each day. I DID make one bad mistake & had forgotten to remove the purigen packet from my filter until Day 2. Days 5-10: it looked like the ammonia was somewhere between 1 and 2 - although much closer to 2. It was a bit hard for me to tell. It looked maybe a *tiny* bit lighter than 2, but definitely not at 1, was the best I could tell. I dosed the normal amount of Stability. Perhaps due to a momentary spurt of impatience (BAD, I know... ), late that evening I dosed more Stability. Day 11: Ammonia was definitely 1.0 !!! I double-dosed Stability that morning. Day 12: Ammonia 1.0. I double-dosed the Stability again. Today is Day 13: I just checked my ammonia & it is almost certainly 0.5 !!!!! I went ahead & double-dosed Stability once more. I don't know if the additional Stability helped, or if it was sheer coincidence that my ammonia started dropping more after I started the double-dose. One way or another, I'm so happy to see the ammonia dropping - YAY for bacteria!!! LOL! One factor could have been my temperature. When I bought my tank (used), it came with a brand-new heater that is "pre-set" for 78 degrees. Without a heater at all, my tank water stays at about 76, so I hadn't bothered to replace the preset heater yet. So the water temp now, using that heater, is simply 78, rather than the higher temp recommend in the cycling guide. I did go ahead & order an adjustable heater a few days ago, before the ammonia levels started dropping for sure. I'll put it in & raise the temperature once it arrives. Should I continue to dose Stability every day? At normal dosage or continue the double-dose? I know the bottle says to use it for just 7 days - but I'd barely had any results at that point. Once my ammonia hits 0.25, that's when I start checking my nitrites & nitrates, correct? I can almost always be patient, and I truly don't mind if it takes a little while for my tank to fully cycle - I was a bit concerned though when I was seeing NO change at all, as it seemed that most folks saw some drop in ammonia fairly soon. Anyway -- one tiny step further towards the day I can get my fishies!!! YAY!!!