I was thinking 20-29 gal long but not sure about filter / lighting / heater, I got SW tanks and sumps but thins is all new....I just want to start with the basics, glass or Acrylic? Substrate, etc. I was going to do a biocube but they seem over priced and small, I really like the idea of an open top with floating plants assuming my fish dont jump out...any help from fellow reefers would be most appreciated! Steve. 781 535 8231