High Tide Aquatics

Kold Sterile, Kati Ani Resins vs RODI Questions

mike1962

mike1962

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I noticed Matt's thread asking people about their tap water filtration methods and read how some of you are using methods other than RODI to filter your tap water. I've heard about the Kold Sterile method, not that familiar with using the Kati Ani Resins that Gimmito is preparing. Since we are all on water meters, any way to save on water costs is worthy of looking into. Those of you who are using these other methods, I'm just curious how well it's working and what made you choose it over RODI. I realize that the level of TDS may play a roll but would like to hear more.

For myself, I am currently running straight thru carbon + DI since the tap water here has very low TDS (in the 30's ppm) and my tank is only 29 gallons.
 
Mike,

You can always use the carbon filter with another regular filter to catch particulates from BRS or Filter Guys.

The main difference from your resins (aside from quality) and the Kati Ani is that you can regenerate the resins over and over. A smaller model would be a wise investment IMHO. Give John a ring at Ready Aquatics, he might be running a MACNA special.

I have my reservations regarding RO and won't go into detail. That being said, I love the no waste factor and water on demand with my setup.
 
Thanks for the info guys. I wondered that the Kati Ani was a variant of the DI resins. I'll call John at Ready Aquatics and see what he has in a smaller version.
 
There is a difference between separate cation bed/anion bed and a true mixed bed (both resins are blended together), in that the mixed bed will produce slightly lower conductivity (purer) water. Separated beds might be better if you plan to regenerate the resin and don't want to bother separating them each time. If you don't plan to regenerate, I don't see any reason to use anything but a mixed bed for your deionization step.
 
Thanks for the reply Matt. Interesting that a mixed bed produces a slightly lower conductivity. I wonder if this has to do with the type/size of cation/anion resin beads? For now I'll stick with the DI system I have, but eventually I want to upgrade to a larger tank/s. At that point it might make more sense to do the separate cation/anion resin system so that the resin beads can be regenerated.
 
mike1962 said:
Thanks for the reply Matt. Interesting that a mixed bed produces a slightly lower conductivity. I wonder if this has to do with the type/size of cation/anion resin beads? For now I'll stick with the DI system I have, but eventually I want to upgrade to a larger tank/s. At that point it might make more sense to do the separate cation/anion resin system so that the resin beads can be regenerated.
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Hi Mike, as far as I understand they are the exact same types of beads, just mixed together rather than in separate canisters. I don't know enough about the chemistry of it to know why mixing them together produces purer water, but that's what the folks at Siemens tell me. :D
 
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