Found my frag tank for setup, got a deep blue. I have a kit coming in to fit my 20L tank to use for a sump. Ordered the Tunze ATO on sale at BRS. Have a few questions...
Why do people say bare bottom for a frag tank. I tried bare bottom before and didn't like it.
Do I need to use live rock or can I just use something like marine pure block in the sump?