hi all i had a question i am considering making the switch to salt water and i was wondering about filtration.the setup i have now is a 40 gallon acrylic tank that is drilled for use with a trickle filter. my sump tank is a 20 gallon and the filter is typical trickle, water pours in from tank, hits the tray,and is trickled onto a prefilter pad then on the bio-balls.i also have an eheim ecco 2235 which i believe is rated for tanks much larger than mine.granted with the 20 gallon sump about half full i really have a 50 gallon.my question is this do i have to get a protein skimmer cause i really dont want to get one if i dont have to. also i dont plan on getting any live rock cause most of the fish i would like to get i believe will destroy it. i want to make this switch with the least amount of expense cause the fish i want are pricey and i am pretty sure that what i have now will work.if not let me know what you think.