Koralia 1 or 2 for a 27 Gallon

[Blue-Wolf]

Holy smokes... I used just a Koralia Nano in my 28g, and it, along with the return pump form the sump, are MORE than enough flow for my tank. Mind you, my sump is supposedly putting out about 1000g per hour.

[Binare]

I had 3 koralia nanos and a 290G return in my 3' long 12G, now I got 2 6025s plus the same return. Obviously no sand, my sps and sixline love it.