- Joined
- Jan 10, 2019
- Messages
- 135
- Reaction score
- 52
So I’ve had my Trident for about 2 months. The alk is showing pretty accurate as well as Mg. The problem is the Calcium. It shows 280 which of course is low. I’ve always had more than adequate ant of Ca as I do not have a lot of demanding corals. However I started using Lanthanum to help with a long standing phosphate problem. As I have read Landanum can lower Ca. Here’s my problem. My Hanna checker is showing Ca at 520 while trident is 290. I tested the trident calibration solution and it showed 508 when it should be 390 according to the reference numbers on the side of the calibration bottle. I need to mention the the calibration bottle has been open about a month but with a tight cap. I’m unsure if I should dose Ca or not. Any help?