Even using 1 cubic inch per 2 gallons, I don't think I'm even at 20 gallons. I will invest into a top off, but until then a black sharpie will do.I have heard that saltwater tanks should be kept to a ratio of one cubic inch per every two gallons. I think anything over that is considered to be heavy stocking.
I would recommend that you start with one or two fish and get the corals going. Then, once that is all going well, add new fish one at a time every now and then.
I do definitely think that a sump is the way to go. However, I would look into an auto water top off that uses FRESH water to replace any evaporated water. This is because the corals are very sensitive to salinity changes and as we all know from elementary science class, salt does not evaporate with the water, hence, salinity goes up with the evaporation of water.
Sounds like you have a good start. If you take it slow then I think you should have no problems that you aren't able to easily correct before anyone bad happens.
Btw, I have never kept saltwater, so take my advice with a grain of salt. I
have done a lot of research on keeping one though.
I haven't seen much of you anymore. Why's that?

