Well, products like purpleup don't do anything. Just alk
/calcium in a bottle...if you want coraline algae to grow, keep parameters where they need to be and maybe introduce some into your tank and brush it gently with a toothbrush.
In terms of the biopellents and all that...yeah you are doubling up on things pretty heavy and that might have something to do with it. I would pick one or the other.