What is everyone using for their QT tank?

A 30g Rubbermaid tub that I used to keep sweaters in.
The size depends on your qt process, you can do ttm in 5g buckets but not a 2.5 month observation; and the stock, coral need better lights than fish and an Achilles tang needs more tank than a goby.
 
I use 5 gallon buckets for ttm. For my new build I will be setting up a permanent QT with sump and all.
 
i usually use 10 gallon tanks for TTM, then i have a 20 long that was a long term QT tank, that i am now calling grow out.

plans are to reconfigure the grow out system to be two larger tanks linked in to the same sump. hopefully coming soon...

i keep a few other tanks around dry just in case, including additional 20 longs. in the event i need to QT a larger fish, or need a temporary home or hospital set up.
 
Purchased a 10g and have yet to use it. Haven't purchased any new fish that I would need one. But it is nice to have it just in case.
 
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