I voted 8 to 9 dkh with both Salifert & Elos. No particular preference. All through the '90,s and into 2000, I always used the cheaper FastTest or whatever the name was. Measured the same as the Salifert I used. Could buy the kits for $10 but dont see the anymore.
I like API for phosphate and nitrate, so may switch to them, as I see you guys say they make alk. test kits also.
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Doug
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