For corals are most people putting them in a quarantine, or dipping, or just dropping them in the display tank and crossing fingers?
For a quarantine setup for smaller fish and corals would a 15 gal or so suffice with a power filter? Is the best method to drop the power filter sponge in my display sump in between uses to populate with bacteria, then when I buy something just drop the sponge in and fill with DT water?