R/O water

do you need to add R/O right additives to R/O water wether its saltwater or freshwater?

How big of a tank do you have? I never add any to my top off water but my system is pretty big so a little at a time doesnt change anything. Smaller tanks are more sensitive to change and it may be a good idea.

i have a 220 reef tank then I have a 40 freshwater with a couple of parrot fish
and do you know anything about PRIME should it stink really bad after its been open for awhile

   I would think the salt water tank would be fine. The fresh water 40 you may wanna check but with parrots what are you keeping the PH in the tank?
Never used  prime before sorry not sure what it is supposed to smell like

RO right is for fresh water only. Prime has an odor (pretty unplesant) but should not be overwhelming. It doesn’t go bad from what im told unless you leave the cap off.