hi to answer your question about to declor or not to.
if you go to buckeyefieldsupply.com you find your answer.
if you have the ro unit that has only the carbon block with sediment block
then you are only taking out chlorine.if your water supply has chloromine then you will need a gac filter which removes chloromine.if you have the ro unit with sediment/carbon and gac filter then there is no need to use declor.
i allways use prime with my tap water.i use a eyedroper.2 drops per gallon.
so if you are using only carbon block the you could probably go 1 to 1.5 drops per gallon.