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finewhatever2 · 04-29-2008, 07:20 PM

We are installing an undergravel filtration system in 20 gallion hex tank. What is the water level for the elbows at the top...submerged or not submerged?

04-29-2008, 07:20 PM	#1 (permalink)
finewhatever2 Teenie Weenie Fish Join Date: Apr 2008 Posts: 1	undergravel filter system We are installing an undergravel filtration system in 20 gallion hex tank. What is the water level for the elbows at the top...submerged or not submerged?