Still trying to finalize my list for this 65-gal
tall tank (36w x 18d x 23h) upgrade (delayed by work etc).
Figuring on ordering 3x30lb bags = 90 lb of aragonite sand, e.g. Aragamax. According to the sandbed calculator, this will give me a 2.2" bed.
At this point I'm figuring on using two of the MaxiJet 1200 PH's and one Hydor Koralia 1 (400gph) circulation pump which I'll locate in the center ~ 1/3 up from bottom. Concern here is too fast water turnover. I've read that 4x/hr is optimal, but this pump, their smallest, is rated 400gph. According to that rule of thumb I should have one ~ 260gph. However it may be that actual flow rate is maybe 3/4 of quoted rate, so this Koralia 1 might close to what I need.
Any thoughts or suggestions?