DI water only
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Steven Pro
New member
Drs. Foster & Smith used to sell the Kati-Ani system which is a DI-only water purifier. Unfortunately, it appears they quit selling them. I just sent Aquatechnic (the manufacturer) an email asking if they have another US distributor. When I get a reply, I will post it here.
ktani
Premium Member
I think that the last ones Dr. Foster/Smith had were sold to me.
After some learning (thanks Anthony) regarding the general instability of the water, it has been a flawless transition with 0 waste.
In a heartbeat I would do it again and hope we can find a source for the product here in the States.
Kip
After some learning (thanks Anthony) regarding the general instability of the water, it has been a flawless transition with 0 waste.
In a heartbeat I would do it again and hope we can find a source for the product here in the States.
Kip
Anthony Calfo
New member
the zero waste thingy is very cool and conscientious 
And DI can be (and often is) a higher quality than RO.
Many industries (plating, processing, etc.) that require high volumes of very pure water only use DI for its purity and (low) cost of production.
RO units have only been so popular in the hobby because they are an older (as in intro to the hobby) and cheaper (initial entry to the hobby) technology.
Times change.
DI is a better way IMO.
And DI can be (and often is) a higher quality than RO.
Many industries (plating, processing, etc.) that require high volumes of very pure water only use DI for its purity and (low) cost of production.
RO units have only been so popular in the hobby because they are an older (as in intro to the hobby) and cheaper (initial entry to the hobby) technology.
Times change.
DI is a better way IMO.
Anthony Calfo said:the zero waste thingy is very cool and conscientious
And DI can be (and often is) a higher quality than RO.
Many industries (plating, processing, etc.) that require high volumes of very pure water only use DI for its purity and (low) cost of production.
RO units have only been so popular in the hobby because they are an older (as in intro to the hobby) and cheaper (initial entry to the hobby) technology.
Times change.
DI is a better way IMO.
Thanks for your expert opinion. Please supply with places I may go purchase a DI unit...
Albert
Hi Anthony and all,
I was also at IMAC and was intrigued by the DI idea. I came home and found the places in Anthony's book to make sure I heard right.
What you do not mention is how to recharge the DI resin.
I bought my water purification RO/DI from a fellow reefer, and it did not come with a manufacturer's recommendations. Is there a recipe for doing this?
Thanks,
Kathy
I was also at IMAC and was intrigued by the DI idea. I came home and found the places in Anthony's book to make sure I heard right.
What you do not mention is how to recharge the DI resin.
I bought my water purification RO/DI from a fellow reefer, and it did not come with a manufacturer's recommendations. Is there a recipe for doing this?
Thanks,
Kathy
Steven Pro
New member
DI units that have the resins separated can be recharged with muriatic acid and sodium hydroxide, but most DI canisters for RO/DI filters do not have the resins separated. The kati resin is usually mixed with the ani resin making recharging impossible until the resins are separated. There are instructions for doing this online specifically for Aquarium Pharmaceuticals Tap Water Purifier, which is a mixed resin DI unit. Those same instructions should work for a DI canister, although one would have to keep them separate after the procedure for easy of future recharges.
Steven Pro
New member
Aquarium Pharmaceuticals does not give the instructions. They want you to buy more replacement cartridges. Here is one online DIY set of instructions,kmleah said:
http://lgonzalez.net/aquatics/deionizer.html
Anthony Calfo
New member
Resins will come with recharging instructions if sold in separate columns.
Buying 2-column deionizers should not be so hard (they are very commonly used in industrial applications). But... the last big mfg for the aquarium industry has lost good distribution in the states.
Steve sent Aquatechnic (the manufacturer in Germany) an email asking if they have another US distributor. They apparently have not replied yet.
Perhaps you can/would do the same to remind them that there is strong interest in their fine product here in the US?
Also... look in some of the freshwater enthusiast mags/message boards, etc. The FW people that raise discus, killifishes, etc love to use DI only.
Anthony
Buying 2-column deionizers should not be so hard (they are very commonly used in industrial applications). But... the last big mfg for the aquarium industry has lost good distribution in the states.
Steve sent Aquatechnic (the manufacturer in Germany) an email asking if they have another US distributor. They apparently have not replied yet.
Perhaps you can/would do the same to remind them that there is strong interest in their fine product here in the US?
Also... look in some of the freshwater enthusiast mags/message boards, etc. The FW people that raise discus, killifishes, etc love to use DI only.
Anthony
Steven Pro
New member
I still have not yet heard back, but as soon as I do I will post the reply here.Anthony Calfo said:
overanalyzer
New member
Anthony Calfo said:
What are the "names" or the types ofthe two resins you would need to use?
Thanks
Steven Pro
New member
SpectraPure sells bulk resins,
http://www.spectrapure.com/St_replac_p5.htm
You would have to get someone to fabricate the reaction chambers, but that should be easy enough.
http://www.spectrapure.com/St_replac_p5.htm
You would have to get someone to fabricate the reaction chambers, but that should be easy enough.
Kent Marine makes a 200gpd DI only unit which can be recharged.
http://www.championlighting.com/home.php?cat=456
http://www.championlighting.com/home.php?cat=456
would we be able to make our own modification to have a two part DI resin filter? I was thinking doing something along the lines of taking our old RO/DI unit and adding a second DI chamber. Then just filling the first DI chamber with one type of resin and the second chamber with the other type of resin.
Is there an order the raw water has to flow through?
Do you guys think this would work?
Is there an order the raw water has to flow through?
Do you guys think this would work?
And DI can be (and often is) a higher quality than RO.
And DI can be (and often is) a higher quality than RO.
I too am sorry that I did not hear this talk by Mr Calfo. I work in a Research facility that generates 1000's of gallons of DI (18 megohm) water a week and that is after it passes through RO units. I dont have the exact numbers right now, but I am always being told how "expensive" DI water is to generate. It is NOT a (low) production cost item.
Secondly I cant imagine that we want to start storing and handling Muriatic Acid and Sodium Hydroxide in our homes. Looking more like an accident waiting to happen. Just my opinion.
I started my reef exactly like proposed. DI only .using 2 and 3 inline mixed bed DI units. This was NOT CHEAP!! My TDS prior to the DI was about 200 - 220. I was lucky to get 50 - 55 gallons of DI water that measured below 15 TDS before I changed out the filter.
Yes we do waste a lot of water with RO .and the " zero waste thingy is very cool and conscientious " but be prepared to spend a lot of time and money with straight DI systems besides the "safety factor" ..........unless there is some new Hitech DI system that I have not seen yet.
Just some Thoughts......Good dialog!
Bill
And DI can be (and often is) a higher quality than RO.
I too am sorry that I did not hear this talk by Mr Calfo. I work in a Research facility that generates 1000's of gallons of DI (18 megohm) water a week and that is after it passes through RO units. I dont have the exact numbers right now, but I am always being told how "expensive" DI water is to generate. It is NOT a (low) production cost item.
Secondly I cant imagine that we want to start storing and handling Muriatic Acid and Sodium Hydroxide in our homes. Looking more like an accident waiting to happen. Just my opinion.
I started my reef exactly like proposed. DI only .using 2 and 3 inline mixed bed DI units. This was NOT CHEAP!! My TDS prior to the DI was about 200 - 220. I was lucky to get 50 - 55 gallons of DI water that measured below 15 TDS before I changed out the filter.
Yes we do waste a lot of water with RO .and the " zero waste thingy is very cool and conscientious " but be prepared to spend a lot of time and money with straight DI systems besides the "safety factor" ..........unless there is some new Hitech DI system that I have not seen yet.
Just some Thoughts......Good dialog!
Bill
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