How to Clean a Red Sea REEFER Protein Skimmer

Step-by-step instructions

Step 1: Identify the skimmer and disconnect it safely

Check the skimmer and installed pump labels, especially if the original AC pump has been replaced. Red Sea's AC skimmer information distinguishes this family from its connected DC equipment. Unplug the skimmer before removing parts or cleaning, handling plugs only with dry hands. Keep the aquarium's other necessary support equipment operating appropriately during the service. Prepare a container for wet parts so dirty skimmate and rinse water cannot drip into the sump, onto electrical connections, or across the cabinet.

Step 2: Empty the collection cup before removing it

Monitor the cup and empty it before it overfills, using its intended removal or valved drain arrangement. Keep the drain hose controlled and close its valve when finished. Do not return the concentrated waste to the aquarium. Note the cup's orientation and the foam-viewing position so reassembly is straightforward. If the cup seems stuck, use the documented release method rather than levering the acrylic with a screwdriver. Check the lid and drain connections for damage while the parts are easy to see.

Step 3: Clean the cup, neck, and manual wiper

Remove the cup and wiper as the assembly instructions permit and wash away the accumulated sludge using dedicated tools. The Red Sea owner's manual, reproduced by ManualsLib suggests daily use of the neck cleaner and washing the cup and wiper about every 7–10 days. Adjust inspection to actual accumulation rather than waiting for an overflowing cup. If detergent is used on the cup, the manual requires thorough rinsing; plain-water cleaning avoids introducing an unnecessary detergent step when it removes the soil.

Step 4: Check accessible air and water passages

With the unit disconnected, inspect accessible tubing and openings for visible obstruction and check that hoses are not kinked. Keep the regulator's previous position in mind rather than changing every setting while the skimmer is apart. Do not push hard objects through small fittings or enlarge an opening to remove a deposit. If a passage needs dismantling, use its part diagram and instructions. A blocked or damaged air connection can affect performance independently of cup cleanliness, so note it instead of assuming every foam change requires more water-level adjustment.

Step 5: Remove and clean the pump according to its manual

The original REEFER instructions recommend monthly pump removal for cleaning. Follow the assembly sequence to access it, open the impeller chamber as permitted, and lift out the impeller carefully. Rinse the detached parts and inspect the magnet, shaft, and chamber for deposits or damage. Do not pull on the power cord, scratch mating surfaces, or bend a shaft. Keep electrical plugs and any added controller dry. This is maintenance of designated removable parts, not permission to open a sealed motor housing.

Step 6: Remove scale only with compatible treatment and rinse fully

If mineral buildup remains, the REEFER manual permits suitable scale-removal treatment for the pump housing or impeller magnet. Confirm the installed pump's current descaler compatibility, dilution, and contact time before treating it; do not improvise a strong acid soak from an unrelated aquarium guide. Perform treatment outside the aquarium and rinse every residue away before reassembly. Check seals and seating surfaces for trapped debris. A cracked magnet or damaged shaft needs the proper replacement rather than another cleaning cycle designed to make it look smoother.

Step 7: Reassemble and watch the restart

Rebuild the pump and skimmer according to their diagrams, refit the cup and wiper, restore the hose arrangement, and confirm that the drain is controlled. Return the skimmer to its specified operating water depth before powering it. Watch for leaks, abnormal noise, and excessive wet foam rather than leaving immediately. Red Sea's troubleshooting guidance separates foam behavior from simple dirt accumulation. If performance changes after cleaning, check assembly and residual cleaner before repeatedly changing every adjustment.