The tank is a non standard 75 gal, 5 foot long, 18 high, 18 wide. Total volume would actually probably 85 for that, but I keep a water line lower than the absolute top.. because of the circulation of the water.. This isn't a problem with my other two tanks because they are open top, where are this one has a top molded in for bracing, more like other acrylics. Currently is has two simple power heads for water movement, and is running with two HOB filters (the "wet dry" ones with the bio wheels (recycle)) until I get the overflow and fuge setup. 50 pounds of Marco setup in two islands, plus about 10 or 15 pounds LR from one of the other tanks. It's currently housing a cleaner shrimp (he was nipping my nem to death) and 3 chromis to get it off and going. The fuge will be a 40b, and I haven't decided on the skimmer yet.. I'm not skimming on it now because the bioload is so low.. and because I want to give the pods a chance to build up with some extra nutrients in the system.. (I need to get the overflow and skimmer in soon to ensure I'm not building up stuff in the rock, I know) The tank has been through a diatom bloom, and a green algea bloom (both small, and small water changes got kept it under control) I change about 5 gallons a week now.. haven't seen the need to do more. RO/DI water from the start.
The chromis eat a variety of frozen that I "melt" in tank water spiked with phytofeast, which is what I feed my other tanks. (More like tank, the 30 cube just has a RBTA in it now, growing out and acclimating so it mostly just gets cyclopeeze and some phtyo here and there) The tank also houses a mushroom rock and a zoa colony, just because I couldn't take all the white

Lighting is two dual bulb T5 fixtures, each running one actinic and one 10k. If I decide on more sps/lps rather than just the misc mushrooms and the zoas (high in the tank), I'd add more light. I'm looking at this tank as being more FOWLR but not completely if that makes sense..
I'm taking my time with the tank, and researching fish.. I don't know that I'll be going with a tang.. I don't know that I'm ruling one out either.... The tank is very much a work in progress.. and something other than a tang may catch my fancy long before its time to stock something that needs a mature tank. I like to research though, and have this stuff "in my back pocket" for when I walk into the LFS and see that "have to have it" fish....