Sweet.
Apologies if you've answered this already, but what's your mechanism to feed the unit? Separate pump with needle valve, etc.?
I'm using an Aqualifter pump to feed mine now (with an irrigation dripline on the output of the pump, which then pushes into the recirc pump intake). It seems to be holding steady this way (finally!). It just seemed that feeding mine off gravity or just the pump intake before, didn't produce enough of a steady driprate (ie. it always drifted over the course of a few days, or stopped altogether). I almost went to using a lab grade metering pump (went so far as to buy one in fact), but if the $10 solution works I'm going to stick with that (and maybe recover the couple hun I spent on the metering pump, unless I can dream up a way to put that thing to use
)