Pond Boss Forums AERATION Systems questions Pump Question

Your aeration and water mixing is very adequate for your current dozen goldfish. Nature's rule is " the fewer fish you have in the small pond the easier it will be to care for it and healthier everything will be. Your pond will over all be healthier if there were 5-7 fish instead of 12-14. InPond pump will not do hardly anything to help control algae. That is not how one controls algae - water mixing and aeration does not do it despite this as a common belief.
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Algae will flourish depending on how much you feed the fish and amount of manure they produce. More and larger fish = more manure = more algae = lower water quality. Fertility grows green water and string algae. Goldfish may eat some of the string algae depending on what type and flavor it is. String algae comes in lots of different types (genus species). Goldfish can be notorious for stirring up bottom sediments and causing filter clogging especially as they become more larger and more abundant. IMO the current pond conditions and inhabitants should do well until the goldfish reproduce, to cause numerous fish and then water quality will noticeably deteriorate. Then you will have problems and then know why, but until then with minimal additions of fish food things should remain relatively stable. Allow the fish to forage mostly on natural foods produced by the pond. If the fish always appear hungry and begging for food you likely have too many fish for this small pond.