Scroll through a few pages and you'll see a number of threads about them. I'm running two koralia 4's in my 75 gal tank and absolutely love them. Keep in mind there flow is a v-shape and NOT a cone shape.
<a href=showthread.php?s=&postid=9961446#post9961446 target=_blank>Originally posted</a> by Buckeye1 rykwong - where do you have them located and in what direction? Is this too much flow for softies and lps in your 75gal?
i have 2 4's and a 6045 nano in my 75. i keep softies and lps. my flow is kinda high, but i am bb so it is ok i would say 2 #4's would be perfect for you.
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