RE: bio balls
if the trade off is between bio-balls and a skimmer, i'll take the skimmer every single time.
all your bioballs don't add up to squat when compared to your live rock in the tank, that is your natural filtration, and FAR more efficient and better for the system anyway.
dump the bioballs, go w/ a skimmer.
"Maybe in order to understand mankind, we have to look at the word itself: "Mankind". Basically, it's made up of two separate words - "mank" and "ind". What do these words mean ? It's a mystery, and that's why so is mankind." ~ Jack Handey