mardarin in a 20gal?

[JasonJ]

just wondering if i can have one in my 20.
its been runnin for 3 months. with no problems so far.

35lbs LR
30lbs LS
prism skimmer
AC power filter.
2 false percs
some zoos
ricordeas
one open brain.
i do 25% water change every 2 weeks.
im not runnin a fuge. although i see a bunch of pods runnin around.

b4 i get one. is there anythin i need to know.
feeding? any specialized care?