Hi Pete–this is Don. Had a problem with a login so I re-registered.
After reading your response, I looked at my Koralia Nano and the circulation parts for the Maxi-Jet: big difference in the width of the grating! The housing or “egg” on the Maxi-Jet is pretty big around. If I use my existing tank for seahorses & pipefish, I’d need to set up a couple of powerheads for circulation—the tank is 30” long and 22” tall—HOB filters do not provide enough circulation for macros. Would the Koralia Nano be strong enough to get across a 30” tank?