For a Soft Corals and a few fish, a 40 Breeder would be great. If you have the patience and discipline, you might not need a filter of any kind. Just something to add some current inside the tank. This requires understanding of a lot of processes though and will have periods of ugliness.
For whatever you choose, evaporation make-up will be a chore. Plan ahead for this issue. Most of us use varying types automatic top offs to make-up for evaporation. A pure water source will also save tons of headaches. I'd invest in a small RODI water purifier unit.
For whatever you choose, evaporation make-up will be a chore. Plan ahead for this issue. Most of us use varying types automatic top offs to make-up for evaporation. A pure water source will also save tons of headaches. I'd invest in a small RODI water purifier unit.