Ok, today I lucked into a 40 gallon tall Marineland SeaClear Eclipse 3.
Basically I walked out of a thrift store with the tank FULL of supplies for 40 dollars. It has UGF, and of course the built in mechanical and wet/dry filter that the eclipse tanks have. I opted to remove the bio-wheel and instead fill that area with hydroton, bioballs and ceramic bio rings.
Right now it's all set up, full of water, filters running and starting its cycle. It has some grey gravel in it, something I've never seen before, but right now I don't really care...
But I'd like to have some fish in this thing within a month, and I'm not yet sure what I want...
I already have:
55g planted community tank (understocked atm)
30g fry tank full of danio and molly fry
20g blackwater tank with a breeding pair of bolivian rams and their fry
20g cherry shrimp tank
and too many 10g shrimp tanks with various shrimp
I've never had angelfish or discus, and I'm thinking about some of those, but I don't know.
If you had a spare 40g tall, what would you do?