Tds zero but .387 phosphate!!! How???

[Sohal Tang Tim]

Hi There..I have amazingly high phosphae in my display tank.
So I test the RO water to make sure the ZERO TDS it is showing is fact.
I get two other tds meters ..so 3 tds meters all show zero TDS...
Then howwwww in the hellllll am I getting .387 phosphate showing in that RO water! Once I mix it with the salt it goes over .400 !!!!

??? Any ideas people? I thought if the tds was truly zero that there is no phosphate in that water??? Is that not correct or is it possible to have
the readings I am getting and if so..why and what can I do about it?

Thanks kindly,
Tim

 

[outssider]

if you round off .387....you get ....0....

your meter will only show 1 when you get over .5 ppm of dissolved solids

 

[Sohal Tang Tim]

thx

thx

thx

 

[Max marine]

Hi there you can round it of to zero
I gotta tell you my experience
Man thats too much actually the TDS in my locality is to high its more than 300 and I am facing too much problems like hair fall etc.

 

[Sohal Tang Tim]

but I thought the PO4 level we should be aiming for is .030 ???

The Hanna checker I am using does measure Phosphorous and the formula I use converts it to a Phosphate measurement...so we can measure lower the 1 Po4...