11 Water purifying apparatus, devices, equipment, installations and systems; water purifying apparatus, devices, equipment, installations and systems for aquaculture; water purifying apparatus, devices, equipment, installations and systems for fish farming purposes; water purifying apparatus, devices, equipment, installations and systems for land-based fish farms and tanks; aquaponics, and aquaculture equipment in the nature of integrated systems for raising fish and other aquatic life comprised of mechanical and chemical water filters, water heaters, water sterilizers, strainers for plumbing drains, plastic plumbing fittings, namely, couplers, traps, adapters, valves, and lights