Quote:
Originally Posted by Gumby  OK, I am seriously considering purchasing 1 (maybe 2) of these Hydor Koralia's, but what size do i need for a 75g tank? Its your basic 75g that is approx 4ft long. |
That depends on how much flow you want, what your substrate is(fine sand gets blown easily), what type of corals you have (sps require more flow than lps), etc.
The Hydor Koralia 4 pushes 1200 gph
The Hydor Koralia 3 pushes 850 gph
The Hydor Koralia 2 pushes 600 gph
The Hydor Koralia 1 pushes 400 gph