Nikki,NaH2O said:What are you measuring your pH with? Monitor, test kit? Are you dripping kalkwasser?
Nearly all high pH situations encountered in reef aquaria are caused by a carbon dioxide deficiency.
My water parametersNaH2O said:Insufficient levels of carbon dioxide would cause high pH. What is the pH of your newly mixed salt water? When was your pH probe recalibrated last? Are you adding any other supplements? What are your water parameters...alk, ca, mg, etc?
Here is an quote from the linked article below:
High pH: Causes and Cures, by Randy Holmes-Farley