I used nearly 3 gallons of Tech M in my 120g reef over around 2 months keeping my mag level up around 1700ppm+. This did not kill my bryopsis. I think its very interesting that 110reef's treatment described here did not kill his bryopsis as it is still living in the overflow of his tank... and his assumption that his grazers were really the cause of his bryopsis death in his display (the tech m only weakened the bryopsis and made it more vulnerable to the grazers). My tank has no grazers and thus my bryopsis did not die. I do know that many many others reported success using only tech m, thats why I was so discouraged with my lack of results.
Whats the key to eliminate bryopsis with Tech M in tanks with no fish/crabs/grazers??? or in areas like overflows and sumps???
btw, good write up, thanks!