Pond Boss Forums AERATION Systems questions Aerating a Donut Dugout

With bottom aeration I do not see a significant benefit to the horizontal circulation unless you want a stream spawning fish such as walleye, suckers, trout, or shiners to reproduce in the stream like conditions. The more a pond shape deviates from the circular shape the more bottom aeration diffusers it takes to get good mixing throughout the whole pond. A bottom diffuser works most efficiently in a bowl shape. Also the more a pond shape deviates from the circular the more shoreline there is and the more space or area there is for weeds filamentous algae(FA) to grow. Weeds and FA are always a problem in shallow shoreline water not in the deep parts of the pond. Pond design can minimize weed problems. Your Canadian pond is likely to be very clear so a large percentage of deeper water will reduce your weed problems.