The fish tank pump is installed in the fish tank, and its function is to transport the water in the fish tank to the filter. Most of them are three pumps, and there are also those with or without wave ports. However, the water inlet of the pump has a water inlet pipe and a flower basket, which has the ability to suck feces. Water-absorbing flower baskets can block large dirt and fish, and are mainly used in the upper filtration system as close as possible to the bottom of the pool.
The bottom cylinder pump is installed in the bottom cylinder and sends the filtered water back to the fish tank. The bottom cylinder pump has no straw and basket, and the water inlet has a cover and sponge. Generally, the head of bottom cylinder pump is higher.