This article by Randy Holmes-Farley contains great amount of information about pH and possible solutions to low pH:
http://www.reefedition.com/ph-and-the-reef-aquarium/ - give it a try if you didn't already
Maybe the blenny is nipping some algae, growing on the skeleton of your chalice and monti?
GL and keep us updated
http://www.reefedition.com/ph-and-the-reef-aquarium/ - give it a try if you didn't already
Maybe the blenny is nipping some algae, growing on the skeleton of your chalice and monti?
GL and keep us updated