pond filtration

What are the benefits of incorporating a biological filter media in water garden filtration systems?
What steps can be taken to minimize clogging and maintenance requirements of water garden filters?
How can filtration systems help improve water clarity and visibility in water gardens?
How does the location and placement of pond filtration equipment impact its efficiency in water gardens?
Are there any specific considerations for indoor water gardens in terms of filtration systems?
What are some indicators or signs that suggest a water garden's filtration system is not functioning optimally?
How does the overall design and layout of a water garden affect the efficiency of its filtration system?
Are there any ongoing research or development efforts for improving pond filtration systems in water gardens?