Sidestream filter?

You're correct that the credit requirements do not call for a sidstream filter. They are filtration systems alongside the cooling tower that filter a small percentage of the water at a time. They are fairly common on high performance cooling towers, but are not a requirement. Instead, please describe the filtration system utilized or provide a narrative explaining why this system does not include filtration. We're mainly looking to see the process by which the system is protected from corrosion and build-up.