Alternating currents?

[Son Of Skyline]

Yes, back to the original topic

IME lighting seems to have more influence on coral growth (at least with sps) than waterflow direction. My sps clearly grow towards my metal halide bulbs regardless of flow direction.

Originally Posted by smokinreefer

oh yeah, as for the altenating current thing...
most corals will do just fine under a constant laminar flow, but an alternating or random currents help prevent dead spots and detritus accumilation within the tank, and it also provides a more natural water movement for the tank inhabitnats.

i favor random currents whenever feasable.