Article in English: If you’re trying to dechlorinate pond water, use a spraying device (like a spraying nozzle connected to a hose) to add air into the water as it enters the pond. Chlorine is volatile and will naturally dissipate in open ponds, but aeration will speed up the process considerably.  Aeration does not work for chloramine, however, which is a less volatile additive used by some municipal water authorities. You’ll need to add a dechlorination agent as well. You can buy dechlorination agents at any pet store.  Every dechlorination agent specifies the amount of water it’s designed to treat, so read the directions carefully.  Adding the dechlorination agent requires unscrewing the bottle's lid, then turning the bottle upside down, allowing the proper amount to drip out.  The water will be ready for immediate use. If you’re using the water in a fish tank with a biological filter, choose a dechlorination agent that doesn’t have an ammonia remover, which could cause problems in your filter. You should always dechlorinate water before adding it to a fish tank, but aerating the water will also aid in removing chlorine.  Fish tanks typically require an air pump to circulate the water, so you’ll get an aerating and chlorine removing agent as a bonus. Buy the appropriate pump for your tank’s size and type, and the pets you’ll be keeping in the tank.

Summary in Vietnamese:
Lắp đặt vòi phun cho hồ cá. Dùng thêm hóa chất khử clo để loại bỏ clo và chloramine. Sử dụng máy bơm sục khí cho bể cá.