How to do the filtration system of villa ornamental fish pond?

Method 1: mechanical filtration below 100 square meter; 100 square meters, ecological filtration; If you buy two ordinary filters within 3 square meters, just put one on each side of the larger pool. Go to the fish watch department or other professional stores to buy an external filter screen for outdoor swimming pools, which is generally around 1 1,000 yuan. Make sure not to change water for half a year. Unless you have a turtle. Method 2: make an ecological circulation filter ... make a stepped pool with a higher water level than the pool near the rockery, and leave a large number of water outlets at the bottom ... fill the jar with sand ... plants that stand out from the water ... let the water filter through the sand box through the traction of the water pump ... The filtered organic matter is grown by plants in the water supply box ... At the same time, the filtered water returns to the pool through the water outlets. ......