I have a 3 gallon FW reservoir that my ATO pumps pull top off water from. It's got a RODI feed tied to a float valve so it's been set and forget. About a year ago I found globs of slime had formed so I started breaking it down every 2 months for a thorough cleaning. Recently I thought I could add a small internal filter whit some ROX carbon to help keep the water fresh. Curious if anyone else is doing this or has any thoughts on if this is a good or bad idea?