I had a feeling that was what you meant, the one we had at the hatchery read the same way and it led to some fish kills. 5 PPT =0.05% lol, your notes are right on tme money and other than snail and a few of the more delicate plants his fish would be fine. I have very old references, I wonder if microworms and protien worms are the same thing, if so they make great food for tiny fry.