hey wseaton do you have a diagram or pic of the inside of the remora
Sorry, don't have a diagram, except to tell you they are stupidly simple. My Remora C is basically a plastic box about, oh 2 inches in depth by maybe 6 inches wide by about 20 inches high. That box is then baffled internally into two sections with the outflow on one side and the reaction/injection chamber on the other.
Also, do you know how the spray induction works?
Take a garden hose turned all the way open, hold your finger over the end, and hold the end a few inches directly over a bucket of water while spraying as hard as you can into the water. Same concept as the Remora - not rocket science. It's conceptually the opposite idea as conventional skimmer in that most skimmers inject bubbles into a water stream. The Remora injects/sprays the entire water flow via a plastic nozzle into the air and then into the water chamber. This means that almost all the water that gets circulated into a remora gets some air contact, generates massive amounts of dense bubbles, and that makes it brutally efficient. Only Becket or large airstone driven skimmers push as much air or seem to be as efficient. I've seen Remora's pull literally gallons of crud out of unskimmed or poorly skimmed tanks in under a day. I abuse one of my
FO 55gals with over-feeding and sparse water changes, and I swear it's the Remora doing most of the work keeping my nitrates at ziltch. Stupid Seaclone sure didn't.
Beware using too large a pump on them or any other skimmer though.
Good point. Unlike a typical venturi skimmer where the more water flow *usually* means better efficiency, you can easily overdrive a Remora and reduce it's efficiency. I've found that a powerhead in the 250-300
gph class works the best like your Maxi or an Aquaclear 402 while my 802 experiment filled my tank with bubbles. The stock pump that comes with a Remora is *insufficient* because you can figure the Remora will cut the flow rate down in half.
I've also found that Remoras work much better running in a sump, or plumbed with cross tank circulation, and this is very
important in their placement. Because Remora's don't move a lot of water, they need to be in a place of high tank turnover such as a sump, or or central circulation to work the best. I have mine set-up so that the Remora sits on one end of my tank, while their powerhead sits on the opposite side. This insures the Remora gets near absolute water turnover, and I'd say this technique has tripled the amount of grunge my Remora pulls out vs having the powerhead connected in stock style. The further away the intake is from the outflow on any skimmer the more efficent it will be. If you have a Remora plumbed this way I'd say even the small one could handle a tank of several hundred gallons.