Q. How do you know when to change filter socks?
A. Mesh filter socks do not catch fine debris and therefore do not need to be cleaned as often as felt socks. But you should still rinse or clean your socks at least once a week or every other week. The more often you clean/change filter socks, the better the water quality. This is especially important for aquariums such as living reefs which require low levels of nitrates and other nutrients.
Q. When should you throw away your filter socks?
A. Quality filter socks should last through many cleanings in a washing machine. Eventually, stitching will come undone or a glue joint will separate; at this point, you will know it is time to replace your filter socks.
NOTE: Some filter sock manufacturer purposely continues the stitching off one corner of their filter socks. Please do not cut these threads; your filter socks will last much longer.
Q. My Mesh filter socks are rated at 200 Microns like my felt socks but it traps very few particles from the water. Is this really 200 microns?
A. Your filter socks could very well be rated at 200 microns. Mesh filter socks, unlike felt filter socks, are made to have a very uniform structure which gives the sock an exact pore opening size. In your case the opening is 200 micron; meaning any floating debris that is larger than 200 microns will be trapped and particles that are smaller than 200 microns will flow through the pores in the material.
Our 200 micron felt sock fibers are randomly locked together and as a result they trap an array of different size particles. Felt filter socks are tested to ensure they trap particles at least 80% of their micron rating size.