Jeff,

I was told by the friend that the Natique had more concentrated copper or something like that. He too was talking about how the cutrine plus doesn't seem to work well on the chara around here especially if you have a layer of it or wait to long. Is you water hard? Hard water may reduce it's effectiveness also.

I haven't used bacteria in a few years. Just too expensive. However the pond manager friend I mentioned swears by it and applies it to several customer ponds. Not sure what he is using but it is in liquid form.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.