New QT or Back-Up tank

[marie]

I have a back up tank running, I call it my liverock tank. It has rock and sand in it along with a powerhead and heater, when I plan on bringing a fish home I usually do a large (3/4 tank volume) water change
When I bring a fish or coral home it goes into that tank first were I can keep an eye on it. If treatment is necessary I catch it out of that tank and put it into a hospital tank. It's pretty much trouble free and gets ignored for weeks on end, when there are no fish in it I don't even bother with lights......it keeps the algae in check