Cobalt Aquatics MJ Water Pump Multi-Purpose Powerhead (5W/7.5W/8.5W/20W)

The Original MJ multi-use submersible pump and power head is built to perform and last under the harshest conditions. Ideal for wave makers, protein skimmers, calcium reactors, nano aquariums, undergravel filters and hydroponic applications. SPECIAL NOTE for REACTOR users: The MJ pump is the perfect pump for use with reactors on reef aquariums. One thing to understand is that reef aquariums have high levels of calcium, in fact at almost saturation levels, and areas with slightly higher temperatures can have active and dramatic precipitation of calcium on parts, ie impellers and impeller shafts. In as little as 4-5 months, calcium can build up enough to stop an MJ pump. Calcium build up is NOT covered by the warranty, but is easily kept in check with routine maintenance. Every 2-3 months, take out the MJ and remove the impeller, soak in distilled vinegar for 15-20 mins, then scrub parts with an old toothbrush and work the impeller up and down the shaft to break up and mineral deposits. Rinse with fresh water and re-install impeller and MJ into system. This simple maintenance will keep your MJ running like new for years.

• Uniquely durable impeller system. The mj's impeller uses a high-strength nylon infused fin-system that flexes to prevent sand, dirt, pebbles, etc. From damaging the fins and pump.
• Extremely quiet and reliable. Made in Italy (same as original maxi-jet) and the quality of manufacturing is evident from the moment you turn it on. Cobalt's MJ is one of the most reliable and quietest pumps on the market. 3-Year warranty.
• Secure mounting and fully sealed intake. Triple Suction Cup mount ensures the MJ stays in place while it delivers strong power and high lift. Fully sealed intake for allows for internal and external use.
• Fully rotational and customizable for many uses. See product images for all the many MJ power head/pump Accessories and uses. Includes 6 foot power cord and cord guide.
• Selection guide. See the product images to determine the best MJ size for your tank.
• Adjustable venturi with silencer, large intake screen for use with sponge, Universal intake tube, and commonly used for wave makers, protein skimmers, calcium reactors, nano aquariums, under gravel filters and hydroponic applications.