RiFisher said:Why is the ph going up and down so much. Is this normal.
yes and no. When you add a lot of chlorine, you see a rise in PH, especially when the FC goes above 10. Then when the
FC drops back down to "normal" the PH does too.
Also, if the TA is not in range, you can see dramatic changes in pH. I believed your TA to be okay before - but you should recheck it to be sure.