Anion vs. Cation vs. Mixed DI resin?

[dmbnpj]

I have the typhoon III unit from airwaterice. I need to order a new bag of resin but going to the website they offer these 3 choices. What are the differences?
Thanks

[bertoni]

Anion resin removes anions (negative charge), and cation resin removes cations. The mixed bed does both, but it is not rechargeable.

[dmbnpj]

So which is the best bet to use?

[Amphiprion]

Mixed bed resins or sequential cation/anion stages would work. It is simply more convenient to use the former, though, since it is combined into one cartridge, whereas the latter are usually in separate stages, IME.

[AZDesertRat]

Go with non color changing mixed bed. Seperate cation and anion resins are really only worthwhile if you plan on recharging resins with acid and lye.

[dmbnpj]

Where do you recommend I find non color changing resin?

[AZDesertRat]

Any of these vendors should have it.

www.spectrapure.com
www.buckeyefieldsupply.com
www.thefilterguys.biz
www.purelyh2o.com