How to lower high ca and mg?

[chercm]

How to lower ? My DKh is 7.6

 

[HighlandReefer]

You will need to stop any calcium or kalk reactors, dosing lime water or adding calcium and mag supplements until your calcium and mag reach the levels you want. You will need to dose an alk supplement to maintain it during this process. Once your calcium reaches your reading you want, then you will need to dose a calcium supplement.

If your salt mix is high in calcium and mag you will need to change to a low calcium and mag mix like Instant Ocean.

 

[chercm]

I am using red sea salt


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I am here: http://maps.google.com/maps?ll=1.367980,103.957455

 

[HighlandReefer]

Per Billy's tests:

Red Sea Coral Pro
Calcium: 490 ppm
dKH (alk): 7
Mag: 1300 ppm


Providing your batch of Red Sea is close to these values, your mag level should not elevate. Mag test kits can be off as much as 200 ppm, so perhaps your mag kit is off or you have added mag supplements in the past elevating the level. It takes a long time for mag levels to drop since it is used in small amounts.

The calcium level will elevate in low demand tank up close to the salt mix level (perhaps 490 ppm calcium). This level should not be a problem.

 

[HighlandReefer]

If you are using the regular Red Sea salt mix not the Pro this is what Billy found:

Red Sea

calcium: 400
alk:8
Mag: 1300

This should be fine to maintain the recommended water parameters in a low demand tank.

 

[HighlandReefer]

Mix up a batch of your salt mix and see what water parameters (alk, calcium and mag) you get.

 

[somethingphishy]

Mix up a batch of your salt mix and see what water parameters (alk, calcium and mag) you get.

2x I've gotten much higher values dkh when I used red sea coral pro