Long-Term Reef Tank Maintenance Plan | Saltwater Aquarium Beginner's Guide: Episode 11
Matthew is 5 months into this build, which means the video series is quickly coming to an end. But before then, we have some important long-term maintenance info to cover so that you can be successful for not just 5 months, but 5 years and beyond.
Algae Control
Stubborn Algae Near Seams & Sandbed
Even if you stay on top of regular glass cleaning, there are always a few spots that algae scrapers struggle to reach. Corners near the silicone seams and the area right above the sandbed are especially common trouble zones.
Over time, a thin layer of hard algae can build up in these areas. Magnetic scrapers often cannot get close enough to remove it, which leaves small patches behind that slowly become more noticeable.
Easiest Solution: Use a razor blade or stainless steel scraper and carefully remove the algae by hand. Just be careful around the silicone seams. Those seams are what hold the aquarium together, so you want to remove the algae without scraping directly against them.
Fortunately, this kind of cleanup only takes a few minutes and can make a big difference in how clean and polished the tank looks.
Nuisance Algae
Most reef tanks will see some nuisance algae from time to time, especially in newer systems.
For a long time, the common advice in reef keeping was simple. If you see algae, your nutrients must be too high. The solution was usually to drive nitrate and phosphate as low as possible.
Nutrients like nitrate and phosphate are necessary for coral health, so the goal shouldn't be to eliminate these nutrients, but to keep them within a reasonable range that supports the overall ecosystem you're building.
That ecosystem includes herbivores and cleanup crew members that naturally graze on algae. Snails, hermit crabs, urchins, and certain fish all play an important role in keeping algae from taking over.
Instead of focusing only on lowering nutrients, successful reef tanks usually rely on a combination of:
- Stable nutrient levels
- A healthy cleanup crew population
- Herbivorous fish
- Good flow and effective filtration
- Consistent maintenance
- Routine water changes
- Thoughtful feeding routine
- Manually removing small patches of algae before they get out of hand
Deep Cleaning Pumps & Powerheads
Pumps are constantly exposed to algae, detritus, and coralline buildup. This can reduce flow and cause the pumps to fail if they're neglected long enough.
Cleaning return pumps, powerheads, and other feed pumps every 4 to 6 months helps keep everything running smoothly and often extends the life of the equipment.
Most reef keepers use citric acid for this type of cleaning because it dissolves calcium deposits very effectively. Regular distilled white vinegar can work as an alternative.
How to Deep Clean Aquarium Pumps
1. Unplug the equipment
Always disconnect pumps and powerheads from power before removing them from the aquarium.
2. Disassemble the pump
Take the pump apart according to the manufacturer’s instructions. Most pumps allow you to remove the impeller or propeller for cleaning.
3. Prepare a warm citric acid bath
Fill a bucket with warm water and mix in citric acid according to the directions on the container.
4. Soak the pump components
Place the disassembled pump parts into the solution and allow them to soak for about 1 to 2 hours.
5. Scrub away remaining buildup
Use soft brushes (like an old toothbrush) to clean the impeller, housing, and any tight areas where buildup remains. If there are some stubborn spots, put the pump back in the citric acid bath for another hour or so.
6. Rinse with fresh water
Thoroughly rinse all parts with clean water.
7. Reassemble and reinstall
Once everything is clean, reassemble the pump and place it back in the aquarium.
UV Sterilizer
Beyond maintaining the pump pushing water through the body of the UV sterilizer, they also require occasional cleaning and bulb swaps. Over time, calcium buildup and debris can reduce the amount of UV light that reaches the water, which lowers the sterilizer’s effectiveness.
Checking and cleaning the unit about every six months helps ensure it continues to do its job.
Quartz Sleeve
Inside the sterilizer, the UV bulb sits within a quartz sleeve that keeps the electrical components isolated from the water. As the system runs, calcium deposits can build up on this sleeve. When that happens, the UV light has a harder time passing through the glass and the sterilizer becomes less effective.
To maintain performance, remove the quartz sleeve and soak it in a warm citric acid solution to dissolve any buildup. After soaking, gently clean it with a soft brush if needed. Rinse thoroughly and make sure it is completely dry before reinstalling.
UV Sterilizer Bulb
UV bulbs slowly lose effectiveness over time, even if they still appear to be working.
Most manufacturers recommend replacing the bulb about once per year to maintain proper sterilization performance. Replacing the bulb on time ensures the sterilizer continues to work as expected.
Cleaning the Rear Filtration Chambers
Over time, the rear filtration chambers in an all in one aquarium can collect a surprising amount of debris. Uneaten food, fish waste, and other organic material slowly settle to the bottom of these compartments where they can build up if left alone.
Cleaning this area every 4 to 6 months helps prevent excess nutrients from accumulating and keeps the filtration system working efficiently.
If your aquarium uses a sump instead of a rear filtration chamber, the same idea still applies. Detritus often settles in low flow areas of the sump and should be removed periodically during routine maintenance.
How to Clean the Rear Filtration Chambers
1. Unplug the equipment
Before starting, make sure heaters, pumps, and other equipment are powered off and unplugged.
2. Remove filtration gear & media
Take out filter socks, sponges, pumps, heaters, and any biological media from the chambers.
3. Scrape the chamber walls
Use a handheld algae scraper to remove any algae or other buildup from the baffles and sides of the rear filtration sections.
4. Siphon out any detritus
Use a gravel vacuum or some tubing to siphon detritus from the bottom of each chamber. If you have a sump under your aquarium, you may need to use a small pump for this step.
5. Rinse sponges and biological media
Rinse sponges and bio media in the saltwater you removed from the tank. This helps remove debris without killing beneficial bacteria.
6. Reinstall equipment
Once everything is clean, place the media, sponges, pumps, and other filtration gear back into the filtration chambers.
Take a Step Back
After performing these bigger maintenance sessions, it's a good time to step back and evaluate how your system is performing holistically. Coral health, nutrient levels, equipment performance, etc.
Every reef tank evolves over time, and what worked a few months ago may need to be adjusted as the system matures. For example, you might decide it's time to add a protein skimmer if your regular water changes and media can't seem to keep your nutrient levels in check.
Taking a few minutes to review what's working and not working will keep your tank headed in the right direction for years to come.
Adam has been reef keeping since 2010 and got his start on the Bulk Reef Supply Customer Service team. He believes the best tanks are built around what you enjoy, not what’s trending. Adam is especially interested in simplifying the hobby, exploring the latest gear, and helping others focus on long-term success over chasing perfection.
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