I live in Fremont, and they use Chloramines to treat local water. Ive been using 2 of BRS’s universal carbon blocks with the ro save Z depth sediment filter in front of them. I’m using this on a kinda diy/ Frankenstein 5 stage Rodi setup with a 75gpd membrane I’ve probably only made about 500 gallons (product water) and already am seeing a pressure drop off and high di resin usage. My question to all of you is what do you do to help maximize water production while filtering the Chloramines? I feel like replacing all of those cartridges for every 500 gallons of product water is very cost prohibitive. There’s gotta be a better way. Should I just get a whole new system?