Oh drop from coral glue and putty?

[musaabi]

Mounted some frags yesterday and used the trusted glue, putty, glue technique. Noticed immediately afterwards, my skimmer over reacted and my apex reading 2.5 pH and since then has risen to 4.13. Is this normal? I don’t believe this is accurate considering nothing died in the tank but maybe the curing released chemicals that affect the pH probe?

 

[Randy Holmes-Farley]

The pH is not 2.5. Something is wrong with the testing.

 

[OctaviusBrine]

I would see if something is on your probe. If not it probably needs callibrated.