Understanding sumps/return pumps
I've owned a few reef tanks and have had great success with them. But I've never had a sump! My problem is I just do not understand the plumbing behind it. Could anyone explain to me how the water falls into the sump and is returned to the display tank so perfectly without any overflowing?
How does the return pump not over flow the tank? Or what if it's not strong enough, and the sump overflows. Sorry if this is a stupid question....I literally just have no idea how it works.
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