Red Sea 225 Micron Filter Sock
A range of 3 high quality, reusable aquarium filter bags providing different levels of mechanical filtration. These 10.5″/26cm long filter bags are designed for Red Sea’s REEFER and MAX-S aquariums and will also fit any standard 4″/10cm filter bag holder.
225 micron felt filter bags are ideal for regular daily use and allow a longer period between cleanings compared to 100 micron bags.
| Specification | Details |
|---|---|
| Filter Material | Felt |
| Filter Mesh Size | 225 microns |
| Length | 10.5″ (26cm) |
| Compatibility | Red Sea REEFER, MAX-S, and standard 4″/10cm filter holders |
| Usage | Reusable mechanical filtration |
FAQ
What is the difference between 225 micron and 100 micron filter socks?
The 225 micron filter sock allows larger particles to pass through compared to the 100 micron version, resulting in a longer period between cleanings. It is suitable for regular daily use in stable reef or freshwater aquariums.
Are these filter socks compatible with other aquarium models?
Yes, these 10.5″/26cm filter socks fit Red Sea’s REEFER and MAX-S models and are also compatible with any standard 4″/10cm filter bag holder.
How often should I clean these filter socks?
Clean the filter socks every 4 to 6 weeks depending on tank conditions and fish load. The 225 micron mesh reduces the frequency of cleaning compared to finer mesh options.

Dylan Nolan –
I’ve used these filter socks for three months now and haven’t had to clean them as often as with the 100 micron ones. The water flow is steady and the tank looks cleaner overall. Easy to install and fits perfectly in my REEFER filter.
Trevor James –
The 225 micron filter works well for my saltwater tank. I notice less clogging and the filter runs smoothly. It’s a good upgrade from the standard mesh I used before.
Joshua Anderson –
Great value for the durability and performance. I’ve reused these socks multiple times and they still hold their shape and filtration efficiency. Fits my MAX-S filter without any issues.