RO water pH help

[Bigtrout29]

Hey guys have a quick question cant seem to find my answer so here it goes.

I am using ro water and today I calibrated my ph pen when all said and done I took a reading came back as 5.6 ph figure that's ok cuz I usally get a high reading out of soil.
So I add my nutes witch is green planet medi one there resin and liquid weight then test again ppm was about 565 and ph was 2.5 what am I to do as I have been using the same stuff the hole grow and never had this problem till now..should add only using 50% strength on the nutes

Thanks

 

[Gadfly]

Add PH up until you reach the desired lvl.

 

[Chris Scorpio]

Sounds like yer pen is off

Most RO water is around 6.5

Test it in white vinegar see what it reads

 

[Gadfly]

It’s been years since I was working w R/O water but 5.6 doesn’t sound off. Unmolested Ro is neutral PH but once exposed to air ph drops. That 5.6 number sounds like what my brain recalls being normal for RO coming out of the reservoir.

 

[Bigtrout29]

Thanks guys it was my pen re calibrated and it read 5.6 then re tested with nutes came back at 4.8 checked run off 6.3 so hope unless it is still messed up it is right and my planet doesn't die