I have a Spectrapure MaxCap 90 GPD RODI that I've been using for several years now. Looking at the BRS water saver kits, they are 150 GPD or 200 GPD. Can I use these, or does it need to match the GPD exactly? I see that Spectrapure has something that looks similar, but is more expensive, and there's really no description for it (it's not specifically called a Water Saver, but I'm assuming it is). What do y'all think?