Error on Elos KH test kits

[xtreme]

Thats how my Mg was. The card shows 1 drop = 100ppm then it is crossed out and hand written in 1 drop = 75ppm? Could throw a person off if they're not careful, thats for sure.

[reeferious]

pretty sure this was dreamt up by elios marketing team trying to double up their profit margin. tiny bit of improved measuring accuracy but costing user twice the moola.