On top of the box there is expiry date, is it still ok?
You could dose again 1 ml but then test after one hour instead of 24 hours.
The solution of 10 ml in 100 ml RO water is way far too concentrated and the ph and/or alkalinity too high for the test kit to function.
You could dose again 1 ml but then test after one hour instead of 24 hours.
The solution of 10 ml in 100 ml RO water is way far too concentrated and the ph and/or alkalinity too high for the test kit to function.