So I never knew if my tank actually cycled, but I started with an established media from another tank. It never measured anything for a long time, even with fish. No ammonia, no nitrite, no nitrates. My ph was high at 7.8, but I've recently brought it down. This is my first "big" tank. It's a 75 gallon planted. I have Congo tetras, diamond tetras, and kubotai loaches. I put the loaches in only recently, all the levels were still reading well except for a tiny amount of ammonia. .25ppm. I did my water change. Now, all my levels are reading high. Ammonia has been at .50ppm, nitrite also 50, and nitrates are .10. I am using the api master kit so I know my readings have been accurate. This has been going on for three days. I have been doing significant water changes every day to make sure my fish aren't poisoned. I also recently added peat moss about a week ago. It was from home depot, but it had no additives, and read as being for organic gardening. I have no idea what could be causing this torture to my tank, but I need some advice. I bought some api stress coat which said that it detoxifies heavy metals and dechlorinates. Can I use this in my tank without destroying the cycling process to keep the toxins down? I don't know what to do other than to keep water changing every day, but I don't know how long it's going to stay this way.