300g Rubbermaid Stock Tank. I LOVE this thing. So easy to work in! I have it sitting on concrete blocks to raise it up a little. That helps with the bending and helps to keep it warm. It sits over the floor drain in my basement.
I have a few heaters laying in the bottom, a Koralia and a large Rio powerhead. I also have a few airstones as well. I have one 14K - 400w MH over the middle of this tank. Things that like high light go right in the middle. For things that like a bit of lower light, they go on the outer edges. The pictures below are from when it was first set up. Things have changed as there is a lot more live rock now that what there was originally.
There are a ton of inverts and fish in here. I keep several mandarins, scooter blennies, lawnmower blenny, yellow tang, 2 clowns, wrasses, etc. I also have blood shrimp, peppermint shrimp, linkias, hermits, sea hare, turbo snails, etc. I have a live rock base under the egg crate.