Brown layer on top of my water

[Seriak]

So the assumption is that you do not have an overflow going to a sump that would constantly remove the top layer of grime from the tank.

The following has worked for me.

1) Pointing a powerhead or return at the surface of the tank to keep it clear. You may need a couple on a 135. However, this seems to just relocate the grime to the corners of your tank.



2) On my refugium, I have a suction tube that that just takes the top portion of my water and send it to my sump. But as I said before, if you do not have a sump, this will not work for you.

Chris