Calcium Issue

[garry_boyd3]

Hi, right. I ave checked my refractormetre & its correct.

Stats:

before water change:
KH 10
MG 1230
Ca 380

In bucket
KH 9
MG 1500 (took the lot)
Ca 440


I am in the of the water change but it looks like a need to do a hugh water change...

 

[TigerIssey]

The tank stats actually don't look bad. The calcium does seem a little low, I have a nifty chart in my new book. There is a nice perfect line with 20% error either side. For a KH of 10 you should really have at least 480 calcium for the 3 to be in proportion. Mag seems fine.

I would add just a calcium additive, the new book suggests calcium chloride.

BEFORE doing this, get your calcium double checked if you can incase it is a dodgy test kit.

 

[garry_boyd3]

I did get it checked couple of weeks ago & they sold me that purple up rubbish.... But will go with your advice

But I will do the water change tonight & test again in morning.


Just a climatising hairy mushroom & sun coral.

 

[SkiFletch]

Agree with TI. Natural Sea Water (NSW) has a concentration of 380ppm of calcium, so you're not too far off. Like she says though since the others are a tad high (and that's not a problem), you can just add a calcium suppliment to bring that up. Mag is more than fine and alk is nice at 10dKH.

 

[garry_boyd3]

Thanks Ski. At least I will keep on top of it with the testing from now on