Paul -
I have some experience starting up similar systems; however, you've confused me with the comment about "good" bugs on the skin of a slow sand filter. A chlorine residual you will likely not leave any bugs whatsoever unless they have a strong resiliency against oxidation. The...
There is quite a bit of info on line on Zebra Mussels that should help you prepare. The circumstances of your system and potential for zebra mussels will determine the appropriate dosages and it's difficult to evaluate that without understanding more about your project.
A very good resource is...
A collegue advised me that an associate had posted my name in this thread. Indeed Paterson - Candy, a division of Black & Veatch located in Kansas City, specializes in Design-Build Water and Wastewater Treatment projects.
I would be happy to talk to you about your project feel free to contact...