Large tank setup

[rudy]

I have a 270 gallon 7 foot by 30 inches wide that I will be converting to salt.
It has a 106 gallon sump

Couple of questions regarding it.

I have two coralife superskimmer 220. Could I use both of these rather having to get a new skimmer to handle the size? \


Also what should the sump setup be like. Currently I run fresh so have a ton of bioballs with a drip tray and filterfloss. Basically the water goes through the drip tray into the bioballs into a partitioned chamber and runs over the glass partition into another foam chamber. How would I change this to suit it better for a salt setup?

What does a tank like this need for water changes? Same as a smaller tank? 10% weekly? Or could you cut it down a bit because of the size.

I plan to have over 250 lbs of live rock and some Tuffa for seeding.

Thanks in advance