So, I've been reading about people having a small tank for quarantine and it seems like a good idea to me. One question though. How do you keep them cycled?
i have 2 filters running on my 20 gallon, when i quarantine, i simply take one of the filter and set it up on the quarantine tank. Yay instant cycling (i have gotten a mini cycle once on the main tank though, so watch out for those)
I leave mine set up. The tiny one (2.5g) just has 2 snails in it. The 10g has some snails and some ghost shrimp. They keep it cycled. I throw in a pellet or wafer once or twice a week.
using filter media from an established system usually worked for me, but I've gotten to the point where I usually keep a fish or two in there when not in use for quarantine.