Does anyone have an accurate Phosphate/TDS meter? I'm having a little cyano problems running the zeo method and my API test kits aren't very accurate. I'm also interested in testing my mag and potassium if anyone has those as well?
TDS and phosphate are 2 very different testers... I have a TDS meter, they have a good brand for pretty cheap at SWRC, or you can get a better one from AHL.
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