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[dmcor]

Wow. Lots of advice. I am a bit confused. Got an overflow at the top of the water level. Water falls into a box (inside the tank) with a hole in the bottom connected to a 1" hose that goes to the sump which overflows into a refugium. The sump and refugium are not too noisy. The noise is from the water overflowing into the overflow -column where there is enough water wating to drain that it splashes and makes noise like a toilet. The guy at the pet shop said to put in some bio balls - that breaks up the water and does in fact make it quite a bit quieter. I just read that bio balls in the overflow will collect waste and exacerbat nitrate problems. How do you guys keep the water spilling over the overflow into the column that eventually drains into the sump quiet? (With 14 kids - no joke 14 - any peace I can get is valuable. Someone asked about a stand pipe. I do not think I have a stand pipe. Just a drain in the bottom of the overflow box.

Thanks for the help.

Dan