Alk stable calcium won’t drop!

[Reefinghooligan12]

so my alk is maintained around 9. I’ve tried to lower my calcium and can’t. Currently it’s sitting at 578 according to my Hanna checker and hasn’t been lower than 530 in a week. I’m at a loss on what to do. Can anyone help in any way?

 

[Breadman03]

How are you maintaining your alkalinity level? Also note that calcium depletes more slowly than alkalinity.

 

[Reefinghooligan12]

How are you maintaining your alkalinity level? Also note that calcium depletes more slowly than alkalinity.

Dosing BRS soda ash. Stopped dosing calcium completely two weeks ago and no changes

 

[lewisriverfisherman]

What's your mag at?

 

[lewisriverfisherman]

I’ve tried to lower my calcium and can’t.

What does this mean? Have you tried doing a water change? Testing your new saltwater to make sure it has a lower cal 2pm than your tank while matching all and mag levels.

 

[Reefinghooligan12]

What does this mean? Have you tried doing a water change? Testing your new saltwater to make sure it has a lower cal 2pm than your tank while matching all and mag levels.

Yes I’ve done a 30 gallon and two 10 gallon water changes. Tank is 50 gallons, and calcium crept back up. I have no idea how. Mag last night was at 1300

 

[lewisriverfisherman]

I'm wondering what rock you started your tank with? I think I have read something about people using a certain kind of rock and having problems.

I think you mag is a bit low.

 

[Randy Holmes-Farley Verified Community Expert]

Magnesium at any level cannot explain lack of calcium decline. Most likely it is just that the salt mix is adding a lot and the demand for both alk andcekcium is low enough that it declines very slowly. Alk always drops faster on a percentage basis.