Hi guys, so I'm trying to cycle my 10 gallon tank and I'm not sure where my parameters should be. I added a little bit of fish food to build up my ammonia, but it's at 8ppm is that Okay? I keep reading that it should be 2-4, what happens if it's at 8? Also, I have two filters in the tank. I had one of the filters in this same tank a little over a month, while attempting a fish in cycle. (didn't know about the nitrogen cycle) anyways, that one filter has a bunch of slimy cloudy gunk on it that i have to gently scrape off with a tooth brush so my filter doesnt overflow. Should I replace it so the good bacteria eventually gets in it, or does it matter? I'm going to eventually use it to cycle another tank and I don't know if it's already ruined or what. And is it okay to have 2 hang in the back filters in that one tank?