In article , Doug
writes
A while back, I added a sump (DIY wet/dry trickle filter) to one of my
aquariums. I highly recommend it as it gives you a place to put all
that stuff like thermometers, heaters, etc. Since I inject CO2 on the
return line, I've got nothing in my tank except the spray wand for the
return and an overflow skimmer! Using clear poly for these makes for
nearly nothing to detract from the aquascape and the fish! Just my
$0.02 worth!! Best luck!

Is this like a small tank underneath the main one ? I've seen these on
marine tanks, but never worked out how you stop the lower one
overflowing.

How is yours done ?

TIA

--
Alan Silver