Follow along but note it's going to go slow... I don't plan on even adding WATER until I have EVERY piece of equipment in hand and ready to go. No rush (at least not yet

).
Jack, when we started estimating this project we were actually looking at a larger tank and I gave him an approximate weight of 1500+ #'s so he's building to that spec which should be on the safe side. His reputation for OVER building is a highlight to My using him on this one.That's why he's using solid lumber for all of the structure and will be "skinning" the unit for looks once it's a functional unit.
Yes I have seriously looked into and discussed the LED light fixture for this unit but have decided to wait and put THAT kind of equipment into our BIG tank once we build the house.
A chiller is a possibility for sure. It's on the equipment list but it's still under the "maybe" category for now.