Hello all,
I've always enjoyed the look of live plants in my tanks and I have just
downsized to keeping only one tank. (school does that to you) So I've kept
my 240 gal with the overflow down into a sump. I'm using a Mag 18 to pump
the water back up from the sump into the display tank and figure I have
about 1100 gph total coming in from the two inlets.

My problem is that I think there's too much air/water mixing when the water
runs down through the plumbing into the sump and it's compromising my CO2
levels. The 4 live plants I do have in the tank ("tropical amazon" and 3
crypts) are still alive, but I don't feel that they're growing as should be
expected.

Does anyone else have an overflow system to a sump that they use? How did
you control the air/water mixing to prevent CO2 loss?

Thank you,
Justin