I've made a 2 gal. critter cage into a small fry/fuge that is hooked up to my sump. I was wanting to raise snails in it since i am working on getting a Nano for my fish fry and would like snails for my loaches. I'm posting pics. of what it looks like. Basically a pump in the return side of my sump and goes to the critter cage. It then overflows into the inlet side of my sump. There is enough room to replace the criter cage w/ a 5gal.since it was really only a proto. to see if I could syphon off fry and not set-up another tank w/heater and other equipment etc.
This is the return side of the sump. A Rio 600 is attached to the gray rigid pipe.

This is the tank itself. I cut a hole in the lid and feed the clear hose into. The return back to the sump is gravity feed. A 1/2" bulhead and spa hose.

Works great.
Is it big enough to raise snails. Probably ramshorn.
This is the return side of the sump. A Rio 600 is attached to the gray rigid pipe.

This is the tank itself. I cut a hole in the lid and feed the clear hose into. The return back to the sump is gravity feed. A 1/2" bulhead and spa hose.

Works great.
Is it big enough to raise snails. Probably ramshorn.