If you own a Bubble Magus M automatic roller filter, replacing the fleece roll regularly is one of the easiest ways to maintain crystal-clear aquarium water and reduce maintenance.
In this guide, we'll cover the correct replacement roll size, how often to replace it, and what to look for when choosing a compatible fleece roll.
What Size Fleece Roll Fits Bubble Magus M?
The Bubble Magus M roller filter uses a fleece roll approximately:
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Width: 150mm
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Inner Core Diameter: 40mm
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Length: 35m
Using the correct dimensions ensures smooth advancement and reliable operation of the roller filter.
Why Replace Your Fleece Roll Regularly?
As fleece media captures suspended waste, uneaten food, and detritus, water flow gradually decreases.
A fresh fleece roll helps:
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Improve water clarity
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Reduce nutrient buildup
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Lower nitrate and phosphate levels
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Reduce maintenance on protein skimmers and pumps
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Keep reef aquariums healthier
Most reef keepers replace fleece rolls every 4–8 weeks depending on stocking levels and feeding habits.
Choosing a Compatible Replacement Roll
When selecting a replacement fleece roll, look for:
Consistent Material Density
High-quality non-woven fleece provides effective mechanical filtration while maintaining stable water flow.
Correct Core Diameter
The 40mm inner core is important for proper fitment on Bubble Magus M shafts.
Sufficient Roll Length
Longer rolls typically last longer between replacements and provide better value.
Filter Media Depot Bubble Magus M Replacement Roll
Filter Media Depot offers replacement fleece rolls designed for Bubble Magus M roller filters.
Features:
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150mm width
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40mm inner core
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35m roll length
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High-quality non-woven fleece material
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Consistent filtration performance
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Easy installation
Our rolls are designed to provide reliable mechanical filtration while helping reef hobbyists reduce maintenance time.
Installation Tips
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Remove the used fleece roll.
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Clean any accumulated debris from the roller filter.Install the new roll on the supply shaft.
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Thread the fleece through the filter path.Verify smooth advancement before restarting operation.
Frequently Asked Questions
How often should I replace my fleece roll?
Most users replace their roll every 4–8 weeks, depending on bioload and feeding frequency.
What micron rating is the fleece?
Roller-filter fleece works differently from rigid filter media, so micron ratings should be treated as a reference rather than an exact measurement. Our fleece is generally considered equivalent to approximately 100–150 microns.
Can I use generic fleece rolls?
Only if the width and core diameter match your roller filter. Incorrect dimensions may cause feeding problems or poor performance.
Final Thoughts
A properly sized replacement fleece roll helps your Bubble Magus M perform at its best. By replacing the fleece regularly and using high-quality non-woven media, reef hobbyists can enjoy cleaner water, lower maintenance, and a healthier aquarium.