If you're looking for a replacement fleece roll for your Red Sea ReefMat 500, this guide will help you choose the correct size and understand what to look for when replacing your filter fleece.
What Is the ReefMat 500?
The Red Sea ReefMat 500 is an automatic roller filter designed to remove suspended waste before it breaks down in your aquarium. By automatically advancing clean fleece as the filter becomes clogged, the ReefMat helps maintain stable water quality while reducing maintenance.
Because the fleece is a consumable item, every ReefMat owner will eventually need replacement rolls.
Choosing the Correct Replacement Roll
When purchasing a replacement fleece roll, the most important factors are:
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Roll width
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Roll length
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Core compatibility
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Material quality
Using the wrong size can affect installation and performance.
Filter Media Depot FMD 11335 replacement fleece rolls are designed to fit the ReefMat 500 and provide reliable mechanical filtration for reef aquariums.
Compatible Model
FMD Product Code
Roll Size
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4.4 in × 115 ft
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113 mm × 35 m
Package Contents
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2 Rolls Included
OEM vs FMD Replacement Rolls
Many hobbyists compare aftermarket fleece rolls with OEM options before purchasing.
FMD Advantages
✅35m Length vs 28m OEM Roll
✅ Premium Non-Woven Fleece
✅ Reliable Mechanical Filtration
✅ Ships From US
The extended roll length may help reduce replacement frequency compared to shorter rolls.
How Often Should You Replace ReefMat 500 Fleece Rolls?
Replacement frequency depends on:
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Aquarium size
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Fish population
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Feeding schedule
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Mechanical filtration load
Heavily stocked reef aquariums may consume fleece faster than lightly stocked systems.
Most hobbyists keep at least one spare roll available to avoid interruptions.
Installation Tips
When installing a new fleece roll:
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Remove the used roll.
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Verify the replacement roll size.
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Feed the fleece through the ReefMat path according to the manufacturer's instructions.
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Ensure proper alignment before advancing the roll.
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Confirm smooth operation after installation.
Always follow Red Sea's instructions for setup and maintenance.
Frequently Asked Questions
Is this an OEM Red Sea fleece roll?
No. FMD replacement fleece rolls are compatible aftermarket replacements designed for use with the ReefMat 500.
Does the fleece affect water flow?
The fleece is designed for efficient mechanical filtration while maintaining consistent flow through the roller filter system.
How many rolls are included?
Each FMD package includes two replacement rolls.
Final Thoughts
The ReefMat 500 is one of the most popular roller filters in the reef aquarium hobby. Choosing the correct replacement fleece roll helps maintain water quality and reduce maintenance.
Filter Media Depot FMD 11335 replacement fleece rolls provide a convenient and cost-effective option for ReefMat 500 owners looking for reliable mechanical filtration and longer roll length.
Looking for the correct replacement roll?
Browse our ReefMat 500 compatible fleece rolls and keep your roller filter running smoothly.