from what I have heard, the "impurity" in kent techM that was effective at killing bryopsis, is no longer in the product and techM is no longer an effective solution. are you having this experience or find it to be working?
I heard that too. But it helped with the bryopsis issue in my nem tank. But the outbreak might have had more to do with my dangerously low mag levels and the resulting imbalances related to that, than the presence of the said "impurities" in tech-M. Not sure.