1. Establish filtration: there is an outdoor filtration system with high noise. For the water volume of 200, consider setting a filter bucket to flow down from the rockery, but the filter bucket should be hidden.

2. Lighting: The rockery can be planted with grass, and there are two metal halide lamps 150W on the ceiling. I don't know how the sunshine is. If it is sunny and facing south, there is no need to add a chandelier. You can get up on the ground, put PL or 12MM glass sealing ring on the top cover of the lamp in the table, and the lamp will hit upwards.

3. Establish fish farming: mainly grass goldfish or cheap koi fish-strong adaptability.

The most beautiful and relatively cheap method at present. Rockery green bushes, small fish swimming in the pool. There is a trickle, just a little noise.