Hurt: Has that setup been successful for you?
Very successful, since installing both my nitrates and phosphates are nil.
Have you ever had any problems w/ microbubbles in yours?
0 microbubbles. The 1st and 2nd baffle from right to left take care of the microbubbles.
Also, what is the white pvc pipe on the left hand side (near return pump)?
I am assuming you are referring to the T and the ball valve on the left. This ball valve let's me adjust the flow back into the tank without putting anymore back-pressure on the pump. The more I close the valve the more water goes to my DT, the more I open it-less water goes back to my DT. A very easy way to regulate flow through your fuge. Also helps during H2O changes.
What size tank is that?
20g fuge