| I have to disagree in most cases- green water in a closed system is a run away train unless managed very carefully. If you measure pH you will find that pH swings can go from 7 to over 9. You will also notice that algae counts will climb as algae is very short lived and the cells die and accumulate on the pond floor creating a bed for massive aeromonas proliferation. This MUST be drawn off on a regular basis or the fish WILL get ulcer disease. If you aerate, add baking soda, clay( for shade) and draw off bottom water regularly as well as dilute water with water changes you can manage it, as long as you know you have a tiger by the tail.
It is also worthwhile to remind people that a closed system backyard pond is a different biological model than a Japanese mud pond. One operates with bacteria as a dominate species and the other is a seasonal shift from algae as a dominating species to bacteria as a late season species. In the case of a mud pond, stocking levels need to remain moderate or that system too will collapse.
John Smith ( AKA JR) |