Which channel to increase
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Channels 3-6, but don't change more than 5-10% every couple of weeks. Once you get it there, leave it alone long term. One of the worst things for you reef is constantly fiddling with the lights. It can produce strange symptoms that are hard to pin down.
Ok a couple of other questions, because that intensity should definitely be enough for zoanthids.
How high off the water are the lights?
I am assuming that the zoas are in the sandbed. Are the colonies near the edges of the tank and are you running a single light?
How high off the water are the lights?
I am assuming that the zoas are in the sandbed. Are the colonies near the edges of the tank and are you running a single light?
I was thinking the same thing about the height of the lights qbout 2 weeks ago and lowered them. They are about 9 inches off the water now and have been that way for about 2 weeks. I am only using 1 light but its a Reefbreeders Photon that is nearly the same length of the tank. And the zoas are on a rock not right on the edge, but they are om one side of the tank. I also have another coral that looks like it was needing more light and its higher and closer to the center of the tank.
As long as the light spill doesn't bother you I would raise it to at least 12" it seems to diffuse better.
Is there anything in your placement that causes shadowing? Also is it possible that those corals are in a dead spot for flow? Sometimes corals stretch and pale if they aren't getting the flow they like.
Is there anything in your placement that causes shadowing? Also is it possible that those corals are in a dead spot for flow? Sometimes corals stretch and pale if they aren't getting the flow they like.
