Step 5 in Building the Dream Water Garden – Filtration Type
Along with a pump, the filter is one of the most important components in maintaining a healthy, clear pond.
- Mechanical Filter – Called a mechanical filter because it physically traps the pieces of debris and algae in the water. Most are designed to filter water before it enters the pump. This helps keeps fountain heads, as well as the pump, clear of clogging debris. This type of filter should be ran continuously while the pump is in operation.
- Biological Filter (preferred for ponds containing fish) – Called a biological filter because it provides an environment for “good” bacteria to colonize. These good bacteria work to break down harmful ammonia into nitrites, then nitrates, a great fertilizer for pond plants. This type of filter needs to operate on a continuous basis (24 hours a day), otherwise the colonized bacteria will decrease.
- Combination Filters – Some filters utilize both forms of filtration by having mechanical filter media precede the biological section of the filter. Therefore, combining the best of both worlds, you minimize negative debris clogging while maximizing plant and fish life.