I've done one before. It works fine as long as you have a relatively low output pump & maybe have a second emergency drain drilled into the sump in case of clogging.
I used a 20g sump, refugium over a 65g DT. Maxijet to get water up & gravity feed back down into the DT. Works great for releasing LIVE mysis & pods from the refugium section back into the DT.
Ran it this way for over a year, no problems.
Anthony
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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