Silica scales can form in cooling systems through reaction with hardness salts (Ca/Mg) or deposition by itself.  They both need to be considered in any cooling tower management scheme. 

A biocide is a chemical treatment that is formulated to effectively control microbial growth. They can be oxidising or non-oxidising. In this blog post, we share our best practice tips for using non-oxidising biocides in cooling tower water treatment.