Zincs protect your running from galvanic corrosion. Galvanic corrosion occurs from dissimilar Alloys being in an electrolyte such as seawater. Zincs are a type of Anode, other types of Anodes include Aluminum and Magnesium. You might ask yourself which type of Anode should i be using on my boat! Zinc and Aluminum Anodes are used in saltwater while Magnesium Anodes are best suited for freshwater.
Zincs all corrode at different rates based on there mass. Current and water salinity can affect their rate of corrosion. Adding more zincs will not make them last longer; it simply improves their effectiveness by adding more surface area
A monthly cleaning is more than a cleaning, it's preventive maintenance. Our divers are trained to inspect your hull with each cleaning and report any issues that you might not be aware of. Common findings are damage to the hull or running gear, blocked thru-holes due to debris in the water or zincs that have lost there effectiveness.
Yes, certain waterways can promote more growth. Waterways with fast moving current provide more nutrients to barnacles while areas with more exposure to the sun lead to more algae growth on waterline! If you move your boat to a new Marina you may notice changes on how long it takes the growth to appear!