okay so these are picture that were taken justa few minutes ago. just want everyone to check out whats going on with my fish tank. the green algae is starting to really take over in my tank, and if you look closely on the picture with the close up on the rock, there seems to be some dark brown lumps on the rocks and i saw a small brown spot inside the glass tank. should i go ahead and put like hermit crabs, snails, etc to start cleaning up the tank? and thats my sump setup, tank water feeds into the filter sock along with polyfilter right below the sock, then the other side of the sump is my skimmer, chiller and pump. well give me a lot of feed back please. let me know if this is suppose to look like this. started the tank on march 6th.