Have the 40 gallon running for a while now and I am getting a reddish colored algae on the sand with hair on the right side of the tank and from the middle over to the left is a yellowish color which I think will be turning red as there are already some red spots in it. Along with this, a bunch of it has bubbles. I have three fish in there along with two hermits. Should I just count on water changes to clear this up or should I amp up the cleanup crew with more crabs, snails or maybe a goby? Maybe another type of fish?\n \nTank is under 252 watts of T5 lighting and I have two Koralia 750's in it. No skimmer yet.