technoshaman,
You don't ever have to replace the resin in a Kati-Ani unit unless you allow the resins to dry out. If they dry out they won't recharge and are useless. I get about 200-300 gallons between recharges, it varies seasonally. I have the number 2 size unit and use a DIY carbon prefilter made from an old Aquarium Pharmacueticals TWP. Here is the link to where you can buy one so you can compare prices to various RO/DI units and brands, http://www.drsfostersmith.com/product/p ... CatId=4499
"Large amount of water is needed for the recharging process, so if you don't want to waste water and use RO, you will be "wasting" water when recharging the resin."
It actually only takes less than 15 gallons total to recharge both of my #2 units.
You don't ever have to replace the resin in a Kati-Ani unit unless you allow the resins to dry out. If they dry out they won't recharge and are useless. I get about 200-300 gallons between recharges, it varies seasonally. I have the number 2 size unit and use a DIY carbon prefilter made from an old Aquarium Pharmacueticals TWP. Here is the link to where you can buy one so you can compare prices to various RO/DI units and brands, http://www.drsfostersmith.com/product/p ... CatId=4499
"Large amount of water is needed for the recharging process, so if you don't want to waste water and use RO, you will be "wasting" water when recharging the resin."
It actually only takes less than 15 gallons total to recharge both of my #2 units.
