RO with high phosphates

kenziejlooft · Nov 16, 2020

Hi so I have a ro/id system with 2 resin membranes and a po4/co2/SiO2 eliminator I have a a PI test kit and it still shows I have high phosphites I got this from bulk reef supply they told me to run system for a hour I did and it still shows high phosphates I really want to get anenome for my clown fish and don’t want phosphates to kill it is it faulty test or faulty system please help? These are new systems only about a couple weeks old

nereefpat · Nov 16, 2020

What test kit are you using? What is the PO4 reading? Is the TDS zero coming out of your system?

What are the phosphates in your tank? It would take quite a bit of P to kill an anemone.

Garf · Nov 16, 2020

I don’t think you can test RODI for phos, well not with our kits.

kenziejlooft · Nov 16, 2020

nereefpat said:
What test kit are you using? What is the PO4 reading? Is the TDS zero coming out of your system?

What are the phosphates in your tank? It would take quite a bit of P to kill an anemone.

The api tds reading 0 the phosphates in the tank is 3.00ppm going to do a water change with RO/DI haven’t been using that water because I didn’t think the system was working

kenziejlooft · Nov 16, 2020

Garf said:
I don’t think you can test RODI for phos, well not with our kits.

Can you use salifert I think it’s called

kenziejlooft · Nov 16, 2020

nereefpat said:
What test kit are you using? What is the PO4 reading? Is the TDS zero coming out of your system?

What are the phosphates in your tank? It would take quite a bit of P to kill an anemone.

This isn’t filling up with water is that a problem

Garf · Nov 16, 2020

kenziejlooft said:
Can you use salifert I think it’s called

Just mix up a small batch of saltwater using your RODI and test that instead. If it’s zero, you know your getting a dodgy result when testing just the RODI.

kenziejlooft · Nov 16, 2020

nereefpat said:
What test kit are you using? What is the PO4 reading? Is the TDS zero coming out of your system?

What are the phosphates in your tank? It would take quite a bit of P to kill an anemone.

The api test with ro system is super high like above 10 it’s a super dark green not blue color

Garf · Nov 16, 2020

kenziejlooft said:
This isn’t filling up with water is that a problem

It’s probably still working but not Ideal. I would want all of the canisters full. May indicate something isn’t quite right.

What is that canister? A prefilter or a DI resin one?

kenziejlooft · Nov 16, 2020

Garf said:
Just mix up a small batch of saltwater using your RODI and test that instead. If it’s zero, you know your getting a dodgy result when testing just the RODI.

Okay I just did after I read your comment just did it a sec ago and it’s already reading a 2.0

I emailed the company about this problem and they told me to get a different test because they said the API test wasn’t reliable but I still think it’s the system

kenziejlooft · Nov 16, 2020

This is with the ro

nereefpat · Nov 16, 2020

I would do what you can to fill the filter housings all the way. It might take some more time to work out the air, or it might not be set up correctly. Then let the RODI run a couple gallons and discard the water. Then see what you get. TDS after the DI should be zero. Then mix up some saltwater and test for phosphate. It should be phosphate free.