1. When the waterfall filter is started, you need to fill the waterfall with water first. The water level of the fish tank should be full. It should be about 2 ~ 3CM away from the upper edge. The more full, the better. Then, start the waterfall. Within about 2 or 3 minutes, the water inlet pipe will slowly introduce water, which can be started successfully.

2. The inlet pipe of the waterfall filter does not need to be up to the bottom of the cylinder. The waterfall filter is mainly based on biochemical filtration and is physically assisted. It does not directly absorb large particles of dirty things into the filter, therefore, it is unnecessary that the inlet pipe must be at the bottom of the cylinder. It is the nitrified bacteria cultured filter material inside to decompose dirty things into particles and then turn them into non-toxic nitrate.

3. Say it again later, the water in the tank must be as full as possible, and the water in the waterfall pump can be fully filled to start, otherwise it cannot work. Thank you.