another RO/DI question

[mark]

been using their home system for years with only the single DI cartridge. Don't even think they has an aquarium kit when I bought mine. Can get 0 TDS with it.

[DiverDude]

As long as you can get 0 TDS, then the extra stages are just costing you money.

My guess is that not many people on Canreef have more than 1 DI stage.

[Rogue951]

I have no DI and I get 0.

[BWI]

take a look at our units.. we currently have a sale on right now. also if you spend more then $199 you get free shipping!

[intarsiabox]

Are you sure it has 3 DI chambers and not a prefilter/carbon/DI chamber set up? This is the most common way. I can't see any advantage in having any more than 1 DI chamber.

[apexifd]

Originally Posted by intarsiabox

Are you sure it has 3 DI chambers and not a prefilter/carbon/DI chamber set up? This is the most common way. I can't see any advantage in having any more than 1 DI chamber.

http://aquasafecanada.com/aquariumsystem.html

3 DI canisters... I want the system more for family use, but, in the mean time. enough for my other family stuck inside the glass panels

[MrGoodbytes]

I agree, three DI canisters seems pretty redundant. One will work just fine and you can always replace the resin a year or more (or whenever) down the road when it starts to creep.

[mike31154]

Originally Posted by apexifd

http://aquasafecanada.com/aquariumsystem.html

3 DI canisters... I want the system more for family use, but, in the mean time. enough for my other family stuck inside the glass panels

Just had a quick look at the two systems on the page you linked to since I was curious about the 3 DI stages. The last paragraph of the system description confuses me.

"STAGE 5, Stage 6 and Stage 7: (Demineralization by Ionization DI Resin Bead Filtration)
Resin Filter / Demineralization by Ionization– Removes hard water minerals through an ion exchange process. Intended to prevent hard water scaling and staining on the R.O. membrane that are caused by inorganic calcium, magnesium, and soluble iron. Greatly increases the working life of the membrane."

If these are indeed stage 5, 6 and 7 (meaning they are plumbed in after the RO membrane), how can they extend the life of the membrane by removing the minerals described in this statement? If one or more of the DI stages are plumbed in before the membrane, you'll be replacing DI media (not cheap) like nobody's business (depending on the hardness of your source water). So yes, it may increase the working life of the membrane, but you'll be paying through the nose replacing DI media. Probably be more cost effective to get a more conventional system and replace the membrane every two years. Several other things worth noting on the Aquasafe systems is that they don't have clear filter housings for the pre stages and all the DI stages are horizontal. I believe a vertical DI stage is more efficient.