What would cause PH and Alkalinity to always be low?


For some reason or another I cannot raise my PH above 7.3 My coral seems to be doing ok, I do know its bad to be that low. I add reef builder every three days but it never stays up by 8. I have also tested the RO water before a change and it is really low in the 6 area. Any ideas would help


I have the same problem. My PH stays around 7.8 or 7.9. Adding a ph buffer will keep mine up for a few days but i constantly have to add a couple of teaspoons of powdered buffer every few days. Make sure that you buffer your top off water before adding it to the tank.


Active Member
the reef builder may be have too much calcium in it, high calcium means low alkalinity. thats my guess