Red Sea Calcium Tester

[dodgy67]

I have a Red Sea Pro Calcium test kit, lately I have found the test kit turns from purple to what I assume is blue and when I wait 5 minuits it reverts back to purple, then I add a few more drops until it remains at blue, which of these two is the correct reading, has anybody else had this problem

[NewReefer42]

I have same kit. your endpoint should be when it stays blue for about 30s, no longer.

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[dodgy67]

Thanks for that so if the first reading stays tor 30secs that's correct

[NewReefer42]

Thanks for that so if the first reading stays tor 30secs that's correct
yes.


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