Flushing: PH Won’t raise up

[CuriousCultivator]

I currently have a low PH issue causing deficiency in my soil, I’m using a soil cork mix I have 4 gallon pots and ran about 20gallon of clean water tap water thru it (my tap water is 6.5-7.0ph) the run off came out at around 5.2-5.4ph last night I had to stop as lights was going out, I decided to do something risky this morning and ran another 20gallons water mix of 9ph thru it, this has only raised the run off ph too 5.7

I’m aiming for 6.2-6.5, do I just keep going? I’m worried of over doing it now at this point as the result isn’t changing

 

[CuriousCultivator]

Solved: Salt build up, that’s why the water wasn’t changing ph on run off the salts was phing it on the way out, a good dump and refill will hopefully solve it