Ati icp result, rodi silicon super high!

[adrianr514]

I just tested the ro water and it was 7 from 287 from tap water. After di filter its goes down to 0 to1, back n forth. So am pretty sure the ro membrane and di resin is still good.

thats a 97.6% rejection rate so your membrane is still fine.

 

[Randy Holmes-Farley Verified Community Expert]

So does ec meter detect silicon??

That’s what a tds meter is. How well it responds depends on pH.

 

[Randy Holmes-Farley Verified Community Expert]

Silicone oil lubricant and even micro bits of silicone rubber will also show up as Si in an icp

 

[Randy Holmes-Farley Verified Community Expert]

A properly working di resin with effluent at 0 ppm tds should not let through 35 ppm of silicate. While silicate is only a concern if diatoms are an issue, I’d consider adding another mixed bed di after the one that purportedly letting through silicate.

 

[Jilet]

A properly working di resin with effluent at 0 ppm tds should not let through 35 ppm of silicate. While silicate is only a concern if diatoms are an issue, I’d consider adding another mixed bed di after the one that purportedly letting through silicate.

Thanks Randy for your response, my tds reading is 0 and 0 when ive sent the rodi water sample to ati icp. Am just confused if my rodi water really has 34000 of silicon. I do have little bit of cyano on the sand bed, nothing serious so should i be concerned about changing my color changing di resin, color is still good?

 

[Randy Holmes-Farley Verified Community Expert]

If you do not have a diatom problem, I’d ignore the Si value. Some fine tanks have super high values. I’m not even sure what exactly the chemical is in those cases.