Originally Posted by
ameno
http:///forum/post/2494765
I have had the same problem with my 125. alk. and mag. good but cal. low.
I have been doing the same as MaTT B and using turbo cal. to bring it up. as Veni said it takes a lot of two part to raise the cal. level. I also found the salt mix I was using had a low cal. level to start with. so using a salt mix that has a higher cal. level will also help. I am still fighting the battle of bringing mine up and may have to resort to a cal. reator before it's over.
Checking the saltmix you use for water changes is great advice. I couldn't figure out why I was having so much problem keeping my pH and Alk up, as well as Calcium but my pH and Alk was giving me the biggest problem. Then I got smart and checked my newly mixed saltwater just before a water change. My pH and Alk were WAY LOW!!!
So now I buffer my newly mixed saltwater BEFORE I do the change. Amazing how things are starting to even out now.
(I'm using Reef Crystals, but I also think it has to do with my RO/DI water. I tested it right after it comes out of my unit and the pH is 7.0. My Reef Crystals gets it up to 8.0, but of course that is not enough, so I have to give it a little help.)