Someone else suggested to me to check my salinity, but it has always been steady at 1.025, so don't think that is it. My other params, KH, Ca, have also been steady.
Don't have a lot of algae, but still have to clean my glass about once a week. I have a gobie that keeps my sand clean, so no algae there. But I do have lots of coralline algae on the back glass and rocks, and all my urchins seem to like chewing on that.
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