RODI Analysis

[redpine42]

Everything was zero, but Silicon (97.09 µg/l). Any ideas where silicon is coming into my RODI. I do create 50 gallons of RODI at a time into a plastic container. Could it some how leach from the plastic?

https://lab.atiaquaristik.com/share/821f35a5cb653c765db7

 

[Ranjib]

Everything was zero, but Silicon (97.09 µg/l). Any ideas where silicon is coming into my RODI. I do create 50 gallons of RODI at a time into a plastic container. Could it some how leach from the plastic?

https://lab.atiaquaristik.com/share/821f35a5cb653c765db7

it is common to have silicate in tap water , i dont know from where they come (sand bed based filtration ??).. but they can cause dino

 

[zachtos]

it is common to have silicate in tap water , i dont know from where they come (sand bed based filtration ??).. but they can cause dino

I too have problem from ATI results, and yes I had diatoms and bought UV to solve, but I want to stop the source.

Following actions should be applied in order to provide a stable water quality:

• use silicat adsorber (check RO water)

Does Deionizing Resin not remove this? Do I need to take action?

 

[redpine42]

I too have problem from ATI results, and yes I had diatoms and bought UV to solve, but I want to stop the source.

Following actions should be applied in order to provide a stable water quality:

• use silicat adsorber (check RO water)

Does Deionizing Resin not remove this? Do I need to take action?

My silicon for the Tank are dead on, it's only my RODI that has high silicon.

 

[Randy Holmes-Farley Verified Community Expert]

I'm not sure that qualifies as high enough to be a concern, but was it 0 ppm TDS RO/DI water?

Silicate is among the harder things to remove, and it is likely the RO/DI removed most of it but left the amount you see.

A silica buster DI cartridge may lower it, or use two DI in series if you really want to lower it.

FWIW, I routinely dosed my tank with far more than that RO/DI would provide.

 

[SMSREEF]

I'm not sure that qualifies as high enough to be a concern, but was it 0 ppm TDS RO/DI water?

Silicate is among the harder things to remove, and it is likely the RO/DI removed most of it but left the amount you see.

A silica buster DI cartridge may lower it, or use two DI in series if you really want to lower it.

FWIW, I routinely dosed my tank with far more than that RO/DI would provide.

@Randy Holmes-Farley
I just got my RO water tested and silica came back at

Silicon

261.2 µg/l

Is this a problem that needs fixed?
Everything else is 0 in the RO water. I do have diatom growth in my display but noting too out of control (snails beep it under control)
I reached out to the company and they said maybe I got a defective di resin and they sent me a new one.
I’m just wondering if the new resin comes back again with high silicate if this is a problem, and if I need a different RO system.

 

[Randy Holmes-Farley Verified Community Expert]

@Randy Holmes-Farley
I just got my RO water tested and silica came back at

Silicon

261.2 µg/l

Is this a problem that needs fixed?
Everything else is 0 in the RO water. I do have diatom growth in my display but noting too out of control (snails beep it under control)
I reached out to the company and they said maybe I got a defective di resin and they sent me a new one.
I’m just wondering if the new resin comes back again with high silicate if this is a problem, and if I need a different RO system.

I'd only worry about it if you have problem diatoms.

I regularly dosed silicate to my tank in levels above this.

 

[SMSREEF]

I'd only worry about it if you have problem diatoms.

I regularly dosed silicate to my tank in levels above this.

Thanks for the info Randy

 

[Randy Holmes-Farley Verified Community Expert]

Thanks for the info Randy

You're welcome.

Happy Reefing.

 

[Dan_P]

I'm not sure that qualifies as high enough to be a concern, but was it 0 ppm TDS RO/DI water?

Silicate is among the harder things to remove, and it is likely the RO/DI removed most of it but left the amount you see.

A silica buster DI cartridge may lower it, or use two DI in series if you really want to lower it.

FWIW, I routinely dosed my tank with far more than that RO/DI would provide.

I have a fish only system that can reduce 1 ppm of silicate in a few days. For the folks worried about silicate levels I would like to ask them 1) what test kit do they use to measure silicate and 2) how fast does their system consume silcates.

The first question reflects a concern that silicate test kits may not work at all or give a positive value for a level that is non-detectable. Question two is motivated by what I observed about my system being a silicate sponge and yet not suffering from diatom blooms. Is silicate really an issue? Does the age of the system determine how quickly silicate is consumed? Do older systems normally consume silicate faster then systems less than, say, 1 year old?

 

[SMSREEF]

I have a fish only system that can reduce 1 ppm of silicate in a few days. For the folks worried about silicate levels I would like to ask them 1) what test kit do they use to measure silicate and 2) how fast does their system consume silcates.

The first question reflects a concern that silicate test kits may not work at all or give a positive value for a level that is non-detectable. Question two is motivated by what I observed about my system being a silicate sponge and yet not suffering from diatom blooms. Is silicate really an issue? Does the age of the system determine how quickly silicate is consumed? Do older systems normally consume silicate faster then systems less than, say, 1 year old?

I have a 10 gallon nano. No fish, just corals and inverts. Tanks about 2 years old.
I don’t have a test kit for Silicon.
I sent my RO water and tank water for ICP analysis by ATI.

Ro water was 261.2 µg/l
Tank water 307 µg/l

Since I use the RO to replace evaporation, I guess I am adding in slightly more than my tank inhabitants use because tank water silicon level is higher...

 

[Dan_P]

I have a 10 gallon nano. No fish, just corals and inverts. Tanks about 2 years old.
I don’t have a test kit for Silicon.
I sent my RO water and tank water for ICP analysis by ATI.

Ro water was 261.2 µg/l
Tank water 307 µg/l

Since I use the RO to replace evaporation, I guess I am adding in slightly more than my tank inhabitants use because tank water silicon level is higher...

Much obliged for the information.

I assume the ICP reports Si not SiO2 which kits read out, yes? If yes, then the tank would read ~ 0.6 ppm by a test kit.