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i have 2 x 400 watt mh. my frogspawn is on the bottom seems to be doing ok. my hydnophora is on the bottom also. i'm not sure i sould move him up or not seems to be doing well. any guidance would be appreciated.
Depending on which you have, the branching type can handle it near the top. The encrusting type will do OK under less intensity. Is your tank a 4' tall since you only have 2 mh's? Normally 400's are used for deeper tanks.
And keep any other corals a good distance from the hydophora. They are aggressive and can kill anything to close to it.