The only problem you'd run into is having to drain the tank to redrill it. As far as the mag drive, if you're using it for a return pump, it's more than enough and has good head pressure. Although noise and heat monsters, they are pretty good. Contrary to what most people believe, you don't really want to blast a sump with lots of turn over so that you skimmer and other filtration has enough time to be efficent, especially if you have a refugium or use any chemical filtration. Some people try to get more flow in the tank by just using a strong return pump (and try to get away w/powerheads to do the rest), which in turn makes a skimmer less efficent because there isn't as much contact time in the sump, and a noisy overflow that you have to worry about catching up with, but in your case wouldn't be a problem. This is of coarse true for other reactors like calcium and phosban reactors as well. Some people may disagree with this and think that everything will eventually equalize, but through my experiments/trials w/my tanks, I've found that the more contact time in the sump the better. Also, think about the ocean. Reefs have super fast currents in them, although they don't look like that on TV, if you ever dive, you would be surprized. Also, using powerheads only localizes the flow and doesn't create too much of a natural wave action which you can achieve w/various other equiment that usually clogs or fails altogether, plus you're not putting as much heat in the water if you use an external pump. By the time you buy 4 or 5 good power heads your halfway to buying a good external pump that'd be more efficent in a closed loop setup anyway. I have no brown, green, or red algae of any kind in my tank. From what I have experienced, the higher flow keeps bad stuff from settling in your tank on the bottom and behind the rocks, and instead goes through the water colum where it is skimmer out totally, which is also a hugh benefit when reefing. 9 out of 10 tanks that have great water quality, but big algae problems, are because they don't have enough flow to keep things from settling and spreading thoughout the rockwork. Just my 2 cents.
Can you explain to me your intentions and use of language if they were not directed at me, or am I now taking defense for no apparent reason, like you have?
lol..
