One could get by with just a heater, light, bare bones RO unit, mixed saltwater and eventual manual dosing of two part if you are committed and diligent, and have great success with sps.
Will still need to test a few things fairly often. I have a couple peripheral tanks including my Qt and and a smaller sps setup run this way.
Will still need to test a few things fairly often. I have a couple peripheral tanks including my Qt and and a smaller sps setup run this way.