The AquaCannon will operate quite well in as little as 6ft/2 meters of water. Maximum performance is attained in deeper water, as the hang/contact time of the bubbles is longer. The system is designed to allow for various depths and situations. If placed in a shallow river or lake the unit can be gradually angled downwards, moving material in the bottom creating a deeper area. This will not harm anything and will gradually fill in after the machine is turned off.
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