So, 2 weeks ago, when I was doing my weekly 25% pwc, when I replaced the water, I forgot to add water conditioner before adding it to the tank. In fact, I didn't realized I'd forgotten for at least 15-20 minutes, at which point, I added the water conditioner straight to the tank (figuring better late than never). fast forward a couple days, and I finally picked up the API master kit. My first test of the ammonia seemed to read 0, but I tested again after my PWC this last friday, and it was reading at just a bit light than the .25, remained the same saturday night when I tested it, but when I tested it again today, it was getting up between .25 and .5 So, I've done a 25% PWC (remembering the water conditioner this time), and went ahead and added the final tiny bit of Bio Support that I had left from originally cycling my tank. I'm going to check the levels again tonight, and probably every day for the next couple days to see what happens (doing PWC's if needed). my question is, do you think it was forgetting that water conditioner last week that sent the ammonia rising, or was it something else? The only other thing that has changed is that I added abit of extra filter floss (rinsed in aquarium water first) to the filter to try and get out some of the little white floaties in the tank.) Any advice on further measures or other reasons would be appreciated. Thanks!