Jon, like you I was never over impressed with my closed loops either. FWIW, I found the difference between the 4MD and the Mak4 was not a great difference. I never ran the 4MD long, but that was my thought.
When I ran a Mak4 and a 3MD closed loop, I still had to run a couple 800 powerheads. Thought I had great current, until I seen a Tunze in action.
Pumps like the Sequence or Ampmaster are another story. Put out some serious current. Like mentioned, one has to watch the seals on the direct drive pumps.
It seems with closed loops, run by Mak4 type pumps, the best way is to run Seaswirls. That seems to give the best current and general water movement through out the tank. However they are costly for us also.
07-17-2003, 01:29 PM
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