Just curious, I have the Hydor controller with two of the Hydor Nano 420 powerheads in my Coralife Biocube 29. I seem to have some dead spots in the sand. Just curious where do the members of Reef2Reef place their powerheads in the Coralife Biocube 29. My are on the two side walls one slightly higher than the other. Would love to hear what other people are doing. Thanks.

