- Joined
- Feb 8, 2015
- Messages
- 186
- Reaction score
- 50
So this is the first time I've used reef crystals and my alkalinity is at 8.4 but my calcium is at 450 and magnesium at 1400 not sure why my alk is so low.. Last week was at 9.2 I do have to use a pH up chemical as my pH is low out if my Rodi unit but has not been an issue using the pH up in the past