Not really sure ever since I got my corals it kinda just poped up. I think i was the lights cause i never really had a problem with algae. and no i dont have macro algae. What should i be checking in water parameters?
well i would say to buy a magnesium test. and i use tropic marrin bio-magnesium (its a powder that you use x amount of scoops of to your sump and stir it around to mix) to up my magnesium. but i wouldnt be using an additive til you bought a test kit to check your levels.
the corals are a extra bio-load. they are now putting more waste into the water, esspecially if u are feeding them. test for nitrates and phosphates those are the most common things to cause algea. also try doing a 20% water change. you should also do water changes every other week. if feeding alot try cutting back some.