What tool is used to remove debris from ballast tanks during decontamination?

The tool used to remove debris from ballast tanks during decontamination is a screw low flow diffuser hose. This tool is designed specifically for efficient cleaning, allowing for controlled water flow which helps to dislodge and remove contaminants without causing excessive disturbance that could spread debris. Its design ensures that cleaning can be performed effectively in the confined spaces of ballast tanks, helping to manage the risk of aquatic invasive species and maintain water quality.

Other tools listed, such as the high-pressure spray wand, are more suited for external cleaning or larger surfaces rather than the specific needs of ballast tanks. Rubber gloves are essential for protecting the person performing the decontamination but do not serve a cleaning function themselves, and while a paddle may help in some contexts, it is not the most effective tool for debris removal within ballast tanks. Thus, the screw low flow diffuser hose is the most appropriate choice for this specific application.