View Full Version : Di resin replacement?

06/10/2008, 05:48 PM
After 5 months of use and no problems, its time to buy a new resin recharge? I only use an average of 10gal. per week. Tapwater tds here is quite high, about 800. Would I be better off buying prefilters with different tolerances? Maybe instead of 10, 5, and 1, 1 and .5 and perhaps 2 di chambers? It's a typhoon III, 75gpd

06/11/2008, 01:53 PM

You do not need to replace the resin unless the TDS gets to be above 5 ppm (or if it gets above -0- ppm, depending on how you feel about it).

You don't have to change the filter array unless you want to. Again, this is personal preferrence. Adding a second DI couldn't hurt though.

Air, Water & Ice staff

06/15/2008, 11:24 PM
Thanks for the response Cliff. So you don't think changing the array would help extend the life of the resin? I don't think I'm going to get more than 250-300 gallons out of this one. I'll be upgrading soon to a 100 gal reef from a 30 gal. and am a little concerned about having to replace resin every 2-3months.

06/16/2008, 08:12 AM
Changing the filter array will not have a big impact on the life of the resin .... the pre-filters get out the big pieces in the water and the chlorine in the water but the tds of the water will not change much after the pre-filters thus the water running into the membrane is going to be about the same .... in your case having a high TDS of 800 coming into the membrane, the membrane will remove over 95% thus you are still left with 40 TDS after the membrane for the final DI filter to clean up .... I would suggest buying a 5 lb bag of Di Color changing resin and refill the cartridge as needed ... We sell a 5 bag for $39.95 ( prior your 10% discount) ...

06/16/2008, 11:42 AM
Thanks again

06/17/2008, 07:40 AM
No problem. Just let us know if you need anything else!