I own a DOC 9004 skimmer which I bought in 2017. It work great skimming the surface of my frag tank and I recently bought another one which has the air adjustment box connected to the top magnet.
I can't seem to adjust the new one to skim the surface of my tank. There's an oily film which I'm trying to get rid of. But I can't seem to adjust it to do so. I have try raising and lowering it as well as adjusting the air intake. But I can't create the water fall that my old 9004 has.
I installed it just last week, does it need to break in? Or is there something I am missing?
I can't seem to adjust the new one to skim the surface of my tank. There's an oily film which I'm trying to get rid of. But I can't seem to adjust it to do so. I have try raising and lowering it as well as adjusting the air intake. But I can't create the water fall that my old 9004 has.
I installed it just last week, does it need to break in? Or is there something I am missing?