You missed Hanna on the poll. I know it's covered under "Other", but it's a forerunner too.
Quote:
Originally Posted by Aquattro
I picked Elos, as I have more of those than Salifert, but use both.
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Me too. I also use Hanna for phosphorus and alkalinity. I prefer elos over Salifert, but Salifert is more available, so I'm forced into Salifert often.