I ran a 5 gallon nano for a while, I thought the flow from an aquaclear mini was barely adequte.
Sure the aqualifter will move water (although not sure how much it can move vertically) but from what I've used it for (Top off and CPR overflow siphon) it's not adequte for use as a return pump.
Plus it has a tendancy to clog so I wouldn't use it as a return pump if you intend for organisms to be pumped back up into the tank.
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