I am changing out my membranes in about 5 months. I am changing DI resin in about 4-6 wks. I change sediment filter each month and carbon in two months. I am on well water that I believe is high in iron. I have a whole house filter on water coming into the house and before the RODI unit. This seems like a lot of resin changes and membranes do others see these issues? My corals and fish seem to do OK. I have started being more religious about flushing my membranes weekly to see if it helps. Any ideas? Will I have problems with livestock? I have had some die for seeming no reason.