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It has been said that breaking up the length of the light into two sections with an hr or so off in the middle helps to stop algae. But IMO that light is serious overkill for that tank unless very heavilly planted. Raising it would help and using a piece of screen between the light and tank would also, in this case a double piece.
But the first thing you would want to try is to cut the hrs to about 6.5 per day and perhaps a break in the middle/w that. If the 6.5 hrs works you can increase it after more plant growth happens.
But the first thing you would want to try is to cut the hrs to about 6.5 per day and perhaps a break in the middle/w that. If the 6.5 hrs works you can increase it after more plant growth happens.