RO Membrane didn’t help TDS reading high

[Melissa31595]

We had some tds readings a little high so we changed out the RO membrane and now the TDS is reading even higher. We flushed the system for 12+ hrs and it still reads at a 5-6. What did we do wrong?

 

[Lbrdsoxfan]

What TDS do you start at? Is that number before or after the resin?

 

[Melissa31595]

What TDS do you start at? Is that number before or after the resin?

Incoming is 188. Outgoing is the 5

 

[sfin52]

That di resin looks spent

 

[Reefer Matt]

That could be normal if just after the membrane. They are not 100% effective, which is why resin is required afterward. If this is after the resin, consider changing it.

 

[Melissa31595]

That di resin looks spent

Both of them?

 

[sfin52]

Both of them?

I can't tell the top but the bottom def does.

 

[Reefer Matt]

Are you using di resin, or just filter blocks and a membrane?

 

[Melissa31595]

we have 2 di resin cartridges. They are the 2 black tubes on top of the system

 

[Reefer Matt]

we have 2 di resin cartridges. They are the 2 black tubes on top of the system

Ok. I’d check if they are depleted. Are they mixed beds, or one cation and anion?

 

[sfin52]

we have 2 di resin cartridges. They are the 2 black tubes on top of the system

Are you using cation and anion as 2 seperet resin

 

[Lbrdsoxfan]

we have 2 di resin cartridges. They are the 2 black tubes on top of the system

I'm betting your resin is shot, change it out and try again. Most people tend to burn through it quicker than they realize.

I burn through mixed bed resin easily 2-3 times a year and I use a larger 10" canister. I also make 25 - 40 gallons of water a month with a average TDS of 350. I prefer to use the color changing resin that tells you when it's gone.

 

[Melissa31595]

Ok. I’d check if they are depleted. Are they mixed beds, or one cation and anion?

Not sure tbh

 

[Lbrdsoxfan]

After looking closer @ the photo, the 5 TDS is after the resin. Get some new resin and try again. I'd suggest mixed bed and color changing, so it's easier to monitor and to deal with frankly.

 

[Melissa31595]

Are you using cation and anion as 2 seperet resin

We got the system from the previous tank owner so I’m not 100% sure what they used.

 

[Melissa31595]

After looking closer @ the photo, the 5 TDS is after the resin. Get some new resin and try again. I'd suggest mixed bed and color changing, so it's easier to monitor and to deal with frankly.

Okay! Thank you!

 

[sfin52]

After looking closer @ the photo, the 5 TDS is after the resin. Get some new resin and try again. I'd suggest mixed bed and color changing, so it's easier to monitor and to deal with frankly.

Agree