The pond and filters in time, will mature to give a balanced eco-system. If this is not achieved, toxic waste that the fish produce will not be effectively removed and will cause stress to the fish and weaken their immune system.
This will lead to a reduction in their ability to fight off potential health problems. Growth and development are also adversely affected and in severe cases, fish losses will occur.
Our ponds are often overstocked, over fed and are treated with aggressive chemicals to kill parasites, fungal or bacterial infections. All of these have a detrimental effect on the balance of bacteria we are trying to maintain in our filters. Even a week on holiday with reduced feeding can cause the bacteria colony to die back.