The strainer and elbow inside the tank, flow to the external pipe outside. I made the pipe tall-ish and drilled with an air hole to stop the "slurping". It then flows down to the sump below. The black fitting you see in the forefront is a return nozzle.
D
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"Fins to the left...Fins to the Right, I'm going home to play with my reef tonight..."
If you're looking for me, and I'm MIA from the board, email me at JustDavidP (at) gmail (dot) com.
Experience in aquaria, 35 years. Experience in marine, 20+ years. Experience in Reef Keeping, 6 years. Always a newbie! | 
