Ok, so i have a 36 Gallon bow front, low tech tank. I am running a aquaclear 70 filter and a fluval C4 filter. With lots of BIO....My question is i added the Dr Tim's bacteria and ammonia. I am watching the parameters (ammonia test and nitrite). When the cycle is done what percent of water change should i do? I seen a video where the woman said to do a 100% change...but that seems kinda drastic. Anyone else have any input on this?