cediss said:Jarhead, I've never had a problem with fish or corals and sand. But you have to be somewhat proactive in keeping too much sand from accumulating on some corals. Lagoon corals are often used to some sand and debris landing on them. These include some of the LPS's. Since you have your returns fitted with lock-lines or whatever ya call it, you can control the amount of disturbance your sand gets. Untill you have heavy groves of coral growth I would point the returns up to the middle of the water column and or surface. I find that experimenting with the returns colliding at diferent points in the water column causes some quit varied water motions. In fact as much as I like some wave devices, I would argue that you can create just as varied water currents if you take the time to experiment with the returns in different positions. One particular position that works well is to have opposing returns point towards one another, but at slightly skewed or glancing angles. Try it out, among the results can be this alternating current effect. It's hard to describe, but experiment with it and I think you'll see it can be very interesting to place the nozzles at vatious positions!
April540 said:or maybe I dont have enough small rock.