RO/DI Maintenance Confusion

[tallguy88]

So I have been using my BRS 5 Stage RO/DI system and it has worked great for me...however am I over cleaning/changing the carbon, Resin etc to much?

I usually run the system till i see a 1 or 2 pop up on the TDS meter by this time the Resin has turned a light brown and no longer black/blue. When I change the resin I change the other 3 canisters as well this includes: micron filter, granulated carbon, and carbon block. The micron filter is still perfectly white, as far as the carbon and carbon block i cant tell if they are depleted they still look exactly the same as when I installed them.

My main question I guess is am I throwing away good money replacing all the carbon and micron filter when I can just replace the Resin? If so what would maintenance schedules or signs to replace the other 3 filter canisters? BRS states you should replace the resin and all filters together when you get a TDS reading of 1... or are they just trying to sell me more product?

Thank You!

[gone fishin]

If I changed everything when the resin needed changing I would go broke. My filter element housings are clear. when I see my sediment filter is gunked up and I usually notice a change in system pressure I change the filters.