RODI Phosphate

[Bodyguard]

Hello All,

I recently got back my ICP test on my RODI and Reef. My phosphates were a bit high. ICP showed a Phosphorus of .12ppm and a .03ppm for the reef and RODI respectively. If I did my conversion to phosphate correctly that equates to .09ppm RODI and .367ppm reef water. So my ATO is dumping .09ppm when is fills my return which is a source of my high PO4 levels. I have a 7 stage BRS RODI system. My question is what could be failing in the RODI that would cause this PO4 to bleed through even though I show a TDS of 0 OR is this normal for PO4 to come out of a 7-stage RODI system?? Has anyone done a ICP on their RODI and had similar results?

As a side note, I just got some Phosphat-E to lower the PO4.

Nitrates are about 12-15ppm. Fish only currently and lights have been off. Following BRS 4 month cycle process and I'm at 4 months but not wanting to turn lights on now with that high of PO4. Definitely a algae bloom would occur.

Thanks!

 

[T-J]

Well, this is interesting. Curious if it applies to ICP tests. Have you tested phosphate of your RODI at home?

When I test my RO water it is showing there is high phosphate, what do I do? | D-D The Aquarium Solution

www.theaquariumsolution.com

 

[Bodyguard]

Well, this is interesting. Curious if it applies to ICP tests. Have you tested phosphate of your RODI at home?

When I test my RO water it is showing there is high phosphate, what do I do? | D-D The Aquarium Solution

www.theaquariumsolution.com

I have not because I had no reason to until I got my RODI results. I don't think my Hannah checker would even work with RODI water

 

[fuelman]

you could add a gfo canister after your rodi unit to eliminate the po4 from your source water issue. I'm not a fan of gfo used in the display system myself, but in the rodi water setup it will help remove the po4 . but take a look at what Randy Holmes-Farley has to say about it in this thread

PO4 in RODI

So I've been trying to solve a repetitive PO4 problem. I finally tested my RODI water and found .09 PO4. What do you do with that? TDS is reading 0

www.reef2reef.com

 

[capted]

Interesting. My icp test showed the same .03 also in my ro. I added a second di canister but I didn't get another icp test yet. The hanna can't be used to test fresh water.

 

[Bodyguard]

you could add a gfo canister after your rodi unit to eliminate the po4 from your source water issue. I'm not a fan of gfo used in the display system myself, but in the rodi water setup it will help remove the po4 . but take a look at what Randy Holmes-Farley has to say about it in this thread

PO4 in RODI

So I've been trying to solve a repetitive PO4 problem. I finally tested my RODI water and found .09 PO4. What do you do with that? TDS is reading 0

www.reef2reef.com

So from what I read from Randy's post the PO4 in the RODI is not significant enough to cause the PO4 to elevate.

 

[fuelman]

So from what I read from Randy's post the PO4 in the RODI is not significant enough to cause the PO4 to elevate.

That's pretty much what I took from it. But there's also a few folks on here that put the canister with gfo on the end of their rodi and remove the phosphate from the source water anyways, Then you know it's not a issue, but it's also a added expense. I don't personally have this issue, just trying to help with a few ideas.

 

[Bodyguard]

That's pretty much what I took from it. But there's also a few folks on here that put the canister with gfo on the end of their rodi and remove the phosphate from the source water anyways, Then you know it's not a issue, but it's also a added expense. I don't personally have this issue, just trying to help with a few ideas.

Not sure I want to add more equipment either unless its a real issue.