If I understand you correctly I think it will work. The only thing is that without the "drop" that you will not be able to push too much water through the refugium because the back pressure might cause the refugium to overflow. So you might need to experiment with flowrates to find the optimal rate, but I think it's not a showstopper. Good luck!
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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