Just a helpful hint, but this hasn't really been up and running long enough for too many animals yet. I'd let it run just like this for a few weeks while it establishes itself.
You were smart to increase the water level. You don't want the pump to suck in any air. It's hard on the pump, and it actually forces air into the waterstream, risking superstaturation conditions (too much O2 in the water).
You were smart to increase the water level. You don't want the pump to suck in any air. It's hard on the pump, and it actually forces air into the waterstream, risking superstaturation conditions (too much O2 in the water).