Over the past few months I have been very happy with the growth, PE & overall health of my tank. My corals are growing faster than I had ever managed in the past and with the exception of some algae growing (very slowly) everything appears to be doing fabulous. I have one sole concern at the moment, as things progressed and improved also my PH has slowly climbed up and currently it peaks out at 8.5 during the day & 8.4 at night, I've increased my dosing of vinegar to help offset the rising PH and I'm now considering adding carbonated water too. I can't help but think of the old wisdom of "if it ain't broken don't fix it" only because the tank is doing so well, yet at the same time the health of my 5 fish is becoming a concern, perhaps my corals are loving slightly higher PH (for some odd reason) but fish can't stay healthy if it rises any higher than 8.5. What would you do? Most recent parameters measured; 1.026 salinity 8.5 alk (this limits increased vinegar dosing) 8.5 ph 450 calcium 1300 mag I'm dosing kalkwasser/vinegar together & vodka via ATO water.