artur
Aquarium Advice Freak
Hi everyone. For over 2 years Im using 90 gal. per Day SpectraPure RODI filter. I change around every 6 months my Sediment, Carbon and DI Cartridge. Im testing water with TDS meter, when it gets 0.01 I'm changing them. I have never change RO Resin. I read somewhere that 2 years is mark for replacement. What you guys do? Thanks.