Di resin life

[Jimmylinny]

I have 670 source water going into my rodi system and 30 tds going into the di resin after it has gone through the membrane. I use the brs di resin. Each cartridge lasts me about 60-75 gallons. The whole system is about 2 months old so I don’t think it’s the ro mem I was wondering if…

1. if this is normal di consumption for this high tds

2. how long new di resin lasts once opened from the vacuumed seal bags. I wanted to buy the brs resin in bulk. That way I can save some money in the long run. The brs di resin when ordered in bulk comes in one big bag.

3. is there a more cost efficient resin I could use for my situation?

 

[LegendaryCG]

That’s around what I get out of my resin too. I have a 4 stage RO and dual DI. I think that’s pretty high usage, in my case I have extremely hard water coming in around 1400 tds out of the tap, mostly silicates. I bought a booster pump to see if that helps but haven’t installed it yet. One thing I’ve done is switched to a Triton style no water change reef so I’m only using my RODI for top-off water. Saves me an enormous amount of DI resin.

 

[Shirak]

Are you on a well? Could be CO2 eating up your resin if so. 30tds seems a bit high even for 670 source water. What is the pressure? Booster pump might help if it's low.

Most cost efficient way to use DI resin is run independent cation and anion canisters. The anion tends to get used up way way faster. I also run 2 anion so I can get the full use out of the canister. First one gets fully used up and when I see the color starting to change on the 2nd I pull the first one and repack with new resin. The 2nd one gets move to the the first canister slot and the newly packed one is now the 2nd canister.

 

[Jimmylinny]

Are you on a well? Could be CO2 eating up your resin if so. 30tds seems a bit high even for 670 source water. What is the pressure? Booster pump might help if it's low.

Most cost efficient way to use DI resin is run independent cation and anion canisters. The anion tends to get used up way way faster. I also run 2 anion so I can get the full use out of the canister. First one gets fully used up and when I see the color starting to change on the 2nd I pull the first one and repack with new resin. The 2nd one gets move to the the first canister slot and the newly packed one is now the 2nd canister.

Im not sure if I’m on a well or not. I have a booster pump that brings my psi to 105 so it’s not because of low water pressure. I’m not exactly sure how to add the cation and anion canisters though. I have a 6 stage right now with 2 mixed bed resins

 

[Jimmylinny]

That’s around what I get out of my resin too. I have a 4 stage RO and dual DI. I think that’s pretty high usage, in my case I have extremely hard water coming in around 1400 tds out of the tap, mostly silicates. I bought a booster pump to see if that helps but haven’t installed it yet. One thing I’ve done is switched to a Triton style no water change reef so I’m only using my RODI for top-off water. Saves me an enormous amount of DI resin.

I will probably be doing that soon. What is your average cost for triton method per month?

 

[LegendaryCG]

I will probably be doing that soon. What is your average cost for triton method per month?

That's kinda hard for me to answer.. I'm a year into dosing 2ML a day. I have about 50% of my inital purchase of core7 left. I figure it will last for about 6 months more so around $2.88 a month for a 80G SPS reef. Obviously consumption goes up so this will probably go up a bit over time so maybe ~$3.50 a month. Then there's fine-tuning addatives like Potasium. ICP testing does cost money too and I'm doing 3 a year. So maybe $175 for a full year ($15 a month) all in (but keep in mind no money is being spent on salt for water changes).

 

[Jimmylinny]

That's kinda hard for me to answer.. I'm a year into dosing 2ML a day. I have about 50% of my inital purchase of core7 left. I figure it will last for about 6 months more so around $2.88 a month for a 80G SPS reef. Obviously consumption goes up so this will probably go up a bit over time so maybe ~$3.50 a month. Then there's fine-tuning addatives like Potasium. ICP testing does cost money too and I'm doing 3 a year. So maybe $175 for a full year all in (but keep in mind no money is being spent on salt for water changes).

How many dosing pumps do you have. What’s your testing schedule?

 

[GaryE]

Are you on a well? Could be CO2 eating up your resin if so. 30tds seems a bit high even for 670 source water. What is the pressure? Booster pump might help if it's low.

Most cost efficient way to use DI resin is run independent cation and anion canisters. The anion tends to get used up way way faster. I also run 2 anion so I can get the full use out of the canister. First one gets fully used up and when I see the color starting to change on the 2nd I pull the first one and repack with new resin. The 2nd one gets move to the the first canister slot and the newly packed one is now the 2nd canister.

dang, you just gave me justification for another canister...

I run a 7 stage, (three stages of DI) and go thru anion about every 120 gallons or so.

My input water is about 375 to 420, It's about 9 after RO. Well water is typically pretty high on CO2.

Thought about adding a holding tank to let it gas off for a week or so before running thru DI, but I'm running out of space.

 

[LegendaryCG]

How many dosing pumps do you have. What’s your testing schedule?

I have 2 x apex DOS pumps. I'm using all 4 heads but you technically can use 3 and mix 2 of the items to free up a head.
I generally just watch my salinty and alkalinty and dose based off alk consumption, every 4 months I do an ICP test which gives me a full break down of which elements are off but most of them have been pretty stable.

 

[GaryE]

Im not sure if I’m on a well or not. I have a booster pump that brings my psi to 105 so it’s not because of low water pressure. I’m not exactly sure how to add the cation and anion canisters though. I have a 6 stage right now with 2 mixed bed resins

Pretty easy to tell if you are on a well or not, either you pay the city for your water or you have a pump in the ground with a pipe sticking out about 12 or so inches somewhere in the yard...

On a 6 stage, all you need is one more canister.. Convert one of the two you have now to single resin and you are set.

 

[Jimmylinny]

Pretty easy to tell if you are on a well or not, either you pay the city for your water or you have a pump in the ground with a pipe sticking out about 12 or so inches somewhere in the yard...

On a 6 stage, all you need is one more canister.. Convert one of the two you have now to single resin and you are set.

How do I connect the inline tds meter to the third canister? I think my water comes from the lake lol

 

[Jimmylinny]

I have 2 x apex DOS pumps. I'm using all 4 heads but you technically can use 3 and mix 2 of the items to free up a head.
I generally just watch my salinty and alkalinty and dose based off alk consumption, every 4 months I do an ICP test which gives me a full break down of which elements are off but most of them have been pretty stable.

I don’t have an apex. Is it necessary?

 

[LegendaryCG]

I don’t have an apex. Is it necessary?

No but you'd want a dosing pump of some sort (you could even dose it by hand but that would get old fast I think). It can be any one you like I just happen to have invested into a Apex equipment.

 

[GaryE]

How do I connect the inline tds meter to the third canister? I think my water comes from the lake lol

my TDS meter has one probe before DI and one after.

 

[GaryE]

This is my setup...

 

[Shirak]

This is what my RODI setup looks like. BRS sells single cansiters although the 2 canister setup is a really good deal and only slightly more than a single canister. https://www.bulkreefsupply.com/dual-deionization-canister-1.html

If you do not have one, I would consider this a must. TDS creep will eat your DI resin fast. Especially at your high TDS source water. DI Bypass valve circled in RED. For the first minute or two after starting up the water flow. Shut the DI section off and divert the RO water out of the drain line connected to this bypass valve. I collect it and use for plants, drinking etc. The first gallon of water out of your RO membrane will be several hundred TDS at least. Once the TDS on the RO water is down to where it should be then I can send water to the DI for the reef system.

 

[KStatefan]

Pretty easy to tell if you are on a well or not, either you pay the city for your water or you have a pump in the ground with a pipe sticking out about 12 or so inches somewhere in the yard...

On a 6 stage, all you need is one more canister.. Convert one of the two you have now to single resin and you are set.

Lot of city water supplies also come from a well. My water source if from a public water supply that is from a well and is high in CO2.

 

[Fredinva]

If you are on well water and eating up anion or color changing resin at an extraordinary pace, it is most assuredly the CO2 in the well water. I was going through two mixed bed cartridges and only getting about 80 or 90 gals or rodi water. There are elaborate PVC contraptions you could make, but I simply bought another Brute trash can and bypass my di resin and fill this container with RO water. I dropped in two air stones and a small submersible pump and in a day, most of the co2 is expelled. The RO water is then pumped through my two di resin cartridges and goes into Brute#2. I'm guessing my Di resin will last 5 to six times longer than previously.
Additionally, I'm saving more now by regenerating my own mixed bed resin. I've calculated that one cartridge costs me about $4.35 to regen.

 

[Whasmack]

If you are on well water and eating up anion or color changing resin at an extraordinary pace, it is most assuredly the CO2 in the well water. I was going through two mixed bed cartridges and only getting about 80 or 90 gals or rodi water. There are elaborate PVC contraptions you could make, but I simply bought another Brute trash can and bypass my di resin and fill this container with RO water. I dropped in two air stones and a small submersible pump and in a day, most of the co2 is expelled. The RO water is then pumped through my two di resin cartridges and goes into Brute#2. I'm guessing my Di resin will last 5 to six times longer than previously.
Additionally, I'm saving more now by regenerating my own mixed bed resin. I've calculated that one cartridge costs me about $4.35 to regen.

What size pump are you using to transfer from degassing through the 2x DI canisters?