The Rock was live, the purple stuff is spreading quickly over everything I had a brown algae spike, I am just concerned because I have two corals but everything seems to be thriving, I am just concerned about the nitrates I guess, I can't keep them at 0, I haven't had a ammonia spike yet but I try to do a 4 gallon water change every days, just new at this and I'm trying to make sure I'm not messing up, the bacteria bottle says " you can't add too much" but still I added half the bottle at setup, should I add more?