calcium level

[cwb_reeftank]

ok I tested my calcium on Monday and it was at 390. I tested it today and it was at 410 and I have not put anything in my tank to raise it. I was wondering what would cause it to do that?

 

[twilliard]

testing +/- error. There is always a level of error in test kits.

 

[cwb_reeftank]

should I test it tomorrow to see what its at ?

 

[twilliard]

should I test it tomorrow to see what its at ?

I test back to back and use the middle.

 

[cwb_reeftank]

i'll do it again and see what it comes up with

 

[jason2459]

Yep, both numbers are practically the same.