Oh that sucks. Sorry to hear that. It works on bryopsis plumosa. Do you have a link to one of those references? I would like to check it out, I never heard of byropsis or any algae for that matter having toxins that can break down and poison water. Only those that are deterrents or allelopathic. Nutrient spikes sure, but not poisoned water, because of low concentrations. I think it would be cool to find an algae that can release poisons. Sorry it happened to you of course.