Taking Sump Water from the top of the tank.
Hey all. Quick question as to taking the water from the top of the tank. I have 2 overflows, however, to make them quiet have 90 degree "elbows" that come from the hole in the wall of the glass, to just under the water level. So they are taking the water off the top 10-15mm level of the water. However, they are not actually taking it from the exact top of the water, as in the surface of the water.
Is this an issue, with proteins etc in the water that may float? And hence may be around a while until they get taken in by these overflows??