Better to research now than find out the hard way. lol
How much gph
does the 900 have? usually the model number is the gph
, but I find it hard to believe they consider a 900gph PH a nano. I would go with either a 240gph or a 425gph Koralia tops. You don't want your fish flying around hehe...
Do you have the tank setup yet or still in the planning mode?