TWallace
Well-known member
Where?? So does Tech M use Mg chloride or sulfate??
http://www.marinedepot.com/ps_ViewItem~idProduct~KM3475.html
No one knows what exactly Tech M contains (other than people at Kent). I've tried both magnesium chloride (mag flake) and magnesium sulfate (epsom salt) independently and neither one killed bryopsis. Tech M however has worked for me in 2 different systems and for many others, though.