I see you added a drain.... Might as well add a drip system. If you use warm and cold on the drip you can heat the tank with warm water....
Very nice work (as always)
If you ever get interested in upgrading the mechanical filtering side of things..... look into the mechanical pads that Aquatic eco systems offer. I switched from similar blue bonded pads to a 3 stage set up (course foam, medium, fine pads) and results were pretty evident first time I rinsed the scrubbies....
That room looks like it could house a nice DIY Bio- Reactor as well...... LOL That way we get to see you build some more stuff.......