Salifert - simple, but inaccurate before (2014-2015)
Redsea - quite a drag, but always accurate results.
But now there is improvement with the new batch (2016) salifert potassium test.
Happy Reefing, GlennF.
Hi Glenn,just got informed by Dennis of Seaflower Nl,that the Potassium testkit by Salifert is 2016 Batch ;)