Another fish keeping/aquarium thread

[Chooky]

Mine is made out of a mussel bouy cut in half with a skill saw....it has a little boy that pee's in it for 1 minute every hour on the hour, thanks to a Johnson bilge pump on a timer....There is a plant growing in there....
and fish...? there 3 red ones..

[McDuck]

I am about to set up a smallish tank (40-50l) with as many bristilnose catfish it can handle lol