Quote Originally Posted by Charbud
I bought sum up and down aswell which was leaking when i recieved it and irrated my skin but should i use it for the flush ? dont really like the look of it with the corrosive labels and health warnings on it...bit scary
Yes you do need to adjust the PH of your water during the flushing period.

A PH of 7.9 is quite high for tapwater, did you take the reading after the water had off gassed? My Ph drifts from around 7.2 to 6.8 depending on the time of year.

I only buy PH down, if I ever add too much, I just add water to raise the PH. Once you get used to mixing batches of water up, you can do it pretty much blindfolded.