Submersible pumps designed specifically for hydroponic systems.
Has 5/16" fitting for 5/16" ID tubing. 1/4" ID tubing will fit inside fitting.
NOTE: Models 40 GPH-160 GPH contain a steel shaft and are not suitable for saltwater applications. Larger pumps (250 GPH-1000 GPH) have a ceramic shaft, and these are suitable for saltwater operation.