How to make a simple filtration system in a fish pond?

Self-filtering is particularly troublesome and cannot achieve the filtering effect. Xipu koi fish Fish Pond Filter is especially recommended. Xipu koi fish Fish Pond Filter is the only EU certification and one of the top ten brands in China, reaching the top technical level: 1. Double ion electrostatic filtration, 2. 100 beds of various beneficial bacteria, 3. Ultraviolet algae removal equipment, 4. Blue light sterilization, 5. Life span over 20 years, 6. Automatic backwashing, automatic blowdown.