I have a ten gallon tank. Currently it houses 5 glo fish, 1 betta, 1 ADF, and several ghost and RCS. I have an over the back hanging filter, heater, and a bubbling treasure chest. A cave, a castle cave, dragon statue, and no fishing sign. I have 3 small amazon swords, some sort of fern, another plant with a kinda verigated leaf, moss ball, and a few floating plants. I do a 10-15% water change weekly. Weekly test with the liquid and test tubes. Here's the kicker i understand that this tank should be over poppulated and have all sorts of problems but for some reason everything is perfect. Ph 7.2, amonia nitrate and nitrite 0ppm, clear water, just a little algae but RCS seem to be taking care of that. Temp usually runs around 76-80 degrees F. I figured after the RCS i'd have to upgrade quick but all seems fine. I also change the disposable part of my filter monthly. I'm just confounded why this works or is it just a freak and all will come apart soon?????*celebrate