How do biological filters work in ponds? Bacteria grows fast and eats the algae's nutrients. The filter keeps it in balance. Bacteria develops at a rapid rate because it eats the same stuff that algae does....
Bacteria develops at a rapid rate because it eats the same stuff that algae does. So when you put it in the pond, it starts eating on the fish waste. It starts eating on nutrients that the algae normally eat. The biological filter helps keep everything in balance and even.
There are biological filters as low as 69 dollars, all the way up to 495 dollars. You have those out there that run from 1,500 dollars all the way up to 10,000 dollars.
It depends on the size of the pond and how much maintenance you really want to do for it. A lot of people that are retired have time to clean the filters. Their pond is their hobby.
