I purchased this set to be prepared for when I have to change my filters. There's no reason not to be prepared. I also bought the replacement 50gpd membrane. All told, it was under $120. That's less than $10 month for ultra pure RODI water for my reef as well as RO water for myself!!! How can you beat that? Stop buying water at the store people, invest (one time) in your own AquaFX system and then maintain it! They are durable, easy to install, efficient, and as easy to maintain as there videos demonstrate.
Reviewed by: (Verified Buyer) James Rizas from Kittery, ME on 12/2/2019