Submersible Pump CTP 5800 / CTP 8000 - GRECH Give your pond a clean start with this specially designed pump for pond filters, water fountains & maintenance. These pumps have a Thermal overload switch fitted. Comes with a 3 core cable, and the larger pumps, from 30 watts upwards, all have a 5m cable. Suitable for fresh and saltwater applications. Suitable for all types of water features. Fountains, aquariums, and koi ponds.