ammonia isn't really as big of a factor as you may like to think it is.
With ammonia being highly toxic to fish and that being a fact, could you explain please?
Bignose, having seen your posts i assume you are a scientist or such like. I am really surprised you dont test your water. Do you mind me asking your reasoning? I'm very interested that someone with your obviously scientific brain takes such a risk. Thanks for the advice on the test kits.
Ammonia is a very big factor. But, the tanks have been cycled for a very, very long time now. There have been power outages, but nothing more than an hour or two -- and I always float the biowheel in the tank when the power goes out. When the tanks were cycling, I could smell the ammonia in the water, even as low as between 0.25 and 0,50 ppm. And, I've watched my fish a lot, and would notice if they were being irritated by ammonia. Between my nose and the fish's behavior, I am pretty sure that I would know. I am not 100% positive, but I am 99% sure that nothing has been wrong.
As far as the other tests. I do the weekly water changes, so the KH levels are replenished every time. The water changes also keep the nitrate levels low.
Basically, nothing has changed in terms of the fish's behavior, so I don't need to do a test every week. Like I said, I have the test kits ready. If something happens, I am ready, but I also know that nothing has changed so that there isn't much reason to keep testing for the zero result.
Edit: I also forget, both my tanks have some live plants (they aren't fully planted, but I have a combination of 'easy' live plants like java moss and java fern and silk plants), and aquatic plants take up ammonia as their preferred energy source. So, even if the filters completely conked out, the plants would still take up ammonia and keep the fish safe. I'm really not worried about the ammonia levels at all since the tank is so well established and there are measures to prevent immediate problems from occurring. I think that you will find that many other long-time fishkeepers don't test all that often, either. If you know that there are issues, then frequent testing is obviously advisable. But, when no problems presented themselves for over 6 months, I just stopped testing -- didn't see much point in continuing.