The MANTA Bottom Cleaner from NozzTeq is recycled-water friendly, with interior surfaces and interchangeable rear jetting plates made of stainless steel and ceramic parts to stand up to hard water and grit. It is very heavy at more than 50 pounds, and slides on wide runners that are replaceable, keeping it on the bottom of large-diameter pipes where it will do the most good. The nozzle’s bottom surface will never wear out. Its jetting plate is interchangeable and replaceable, and the plates come in 8-, 10- and 12-jet configurations. 866/620-5915; nozzteq.com.