Quote Originally Posted by quackquack
1. I am assuming I would prefer a more coarse grade for a DSB or a fine bed with less thickness. (LFS recommendation is reef grade)
Do some reading. Specificlally ths thread: http://www.reefcentral.com/forums/sh...ht=bare+bottom

Warning -- you may need to allow several days to read it!

There is a growing opinion that we might be better off without a sandbed, using weekly water changes instead.

Quote Originally Posted by quackquack
5. I don't have alot of cabinet space (about 24x48x16) in my cabinet next to my sump (Oceanic Trickle Filter 75 /approx. 20gal tank). So are there skimmers that can fit the restrictions that I have?

Thanks.
You can get skimmers made to almost any specifications. Try here: http://www.myreefcreations.com They have a skimmer that will allow you to remove the collection cup with no height clearance required, and they can custom make it to any height you want.