Until last week, I had a planted 20 long in my office but I decided to replace it with something different and get back into the saltwater game. I've done a 20 long reef before and found it a little limiting in height. I originally thought of doing a 29 gallon (same foot print as a 20 long but just taller) but I realized that I don't like the height to depth ratio of the 29 gallon. After some searching, I discovered that a Marineland 34 gallon will fit nicely on my stand and decided that I would use that tank. However, after thinking about it for a few days I began to wonder if the stand could take the extra weight so I should probably build a new stand. Now that I'm building a new stand, why not go a little bit bigger and build the stand for a 40 breeder. Since I already have a 40 breeder in my basement that has never been wet, I might as well use it, right? At the rate I'm going, it will be a 180 gallon by mid-march and I'm not sure if my boss would go for that. Livestock: Mixed reef but probably heavy on soft corals/leathers Fish: Shrimp/goby pair, a blenny, and ? Tank: 40 breeder Stand: Built by me and inspired by Jlanger Overflow: Eshopps Eclipse or Synergy Shadow Filtration: Weekly or bi-weekly water changes ATO: Tunze osmolator - I thought about just topping off water manually but I want to keep the salinity as stable as possible and I don't want to come in on the weekend to just add water. Controller: AC Jr Sump: I was originally going to use an empty canister filter for water movement and then run it through DIY inline heaters but since I have the space in the stand, I might as well just put in a sump for the heaters and everything. As for lighting, I'm still debating that. It is likely going to be LED because I don't want to deal with the heat of metal halide and I feel rather lukewarm about T-5. My last tank had T-5 lighting and I was never crazy about it. That said, I have seen some tanks with LEDs that have a pretty significant disco ball effect that I want to avoid.