The Sun Sun/Grech CHJ-600 fully submersible pump is perfect for Nano to medium sized aquariums, small ponds, water gardens and desktop water fountains. Capable of moving 159 GPH, the CHJ-600 offers an adjustable flow rate and is an excellent choice for both freshwater and saltwater applications. The small, yet powerful CHJ Series offers energy savings and versatile placement, while the compact design and low-noise output make the CHJ-600 the one-stop pump for all your aquatic needs.