Locating source of phosphate- how to clean mixing tanks

[Jered]

I recently purchased two containers that were new from an online water tank company. I rinsed them multiple times and ran them for the past 4 months.

I’ve recently been trying to get control of my phosphates in my tank and after using gfo for 9 months, decided to try a non gfo option by using phosphate rx to lower and keep my phosphate at around .03.
Got it where I wanted it and 2 days later was at .12 again. Added 100 drops which should have dropped me to around .08 and was .13 a day later.
So I go searching.
My mixed water is at .14.
my fresh water tank is at .30

so I check my source water at the exit of my 8 stage rodi and it’s 0.0

somehow my tanks are causing elevated phosphate.

will bleaching them and the flushing them with rodi fix this?

Tanks are from tank depot and are food grade water storage containers.

 

[cmoore806]

Bleach kills bacteria not phosphates. If you are serious about fixing the issue I'd get an ATI ICP test that checks your tank and RODI water. If you confirm phosphates there then start working. You could clean the mixing containers with water and citric acid, this would help especially if there are deposits/sediment.

 

[Jered]

Bleach kills bacteria not phosphates. If you are serious about fixing the issue I'd get an ATI ICP test that checks your tank and RODI water. If you confirm phosphates there then start working. You could clean the mixing containers with water and citric acid, this would help especially if there are deposits/sediment.

I’ve located the issue of the phosphates.
Not my source water but is starting in my mixing and holding tank.
Once the pho’s is removed it should solve the issue.
So Citrix acid cleaning on them will remove the phosphate in this water storage bins?

I’m using Hanna ulr phosphate test for results.
.14 in mixed tank, .30 in rodi tank and 0.0 coining out of my rodi unit.

 

[cmoore806]

I’ve located the issue of the phosphates.
Not my source water but is starting in my mixing and holding tank.
Once the pho’s is removed it should solve the issue.
So Citrix acid cleaning on them will remove the phosphate in this water storage bins?

I’m using Hanna ulr phosphate test for results.
.14 in mixed tank, .30 in rodi tank and 0.0 coining out of my rodi unit.

Two questions:

1. what is the phosphate in your incoming tap water


2. Where does the phosphate go between the tanks ? in other words: why the drop in phosphate between tanks.