Hi,
It seems to be a very high tech company and I don't think it could have any adverse effects. Not sure how much benifit it gives, unfortunately haven't had a chance to use it. I did start it out on my home tank, but got busy and never followed through with the additional treatments, so can't say personally how effective it is.
I can tell you that most of our customers that purchase Prodibio come back and buy more on a regular basis. So seems to have a good repeat business, which usually means it's pretty good stuff.