So my tank has been "wet" now for 7 months. I have a IM AIO 25 Lagoon. There are (as I'm sure many of you are aware) 4 chambers on the back of the tank. The two filter chambers, the two return cambers feeding the return pump, & the center chamber that houses the return pump. In one return chamber is my heater, in the other is a mesh bag filled with Marine Pure Biofilter Media balls & a few chunks of live rock rubble. Should I ever clean these areas? They look to have a nice coating of green algae? and who knows what else going on back there. My gut tells me to leave it alone as it appears to look very beneficial. I would greatly appreciate any input? Thanks!