i played around with the pump and was easily able to blow air backwards through it. Judging by this id probably add some sort of check valve between the pump and the ato outlet line.
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- 33 Gal - 20Gal Sump, MP10/Hydor Powerheads, Aquaticlife 4x T-5HO, Vertex IN100, TLF w/Biopellets, Tunze ATO
-45GAL Build in Progress!-
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