I've heard several ideas on this...I've narrowed down that I want a 10 gallon quarantine tank, a 50 watt heater, a sponge filter or corner box filter, and some kind of cover...and a light, though I've been told the light is not 100% essential...and a thermometer...the thing is the biological filtration...I've heard several ideas on how to establish the biological filtration, but none of them sound that promising...does anyone have a method for establishing it? I'd really appreciate it...with all the problems I've had lately, I've decided I MUST have a quarantine/hospital tank.