What micron filter sock is best for a reef tank?

A 100 micron nylon mesh sock is the usual starting point for a reef tank with a sump. Move to 200 micron if the sock blocks too quickly, or to 50 micron if you want finer polishing and can change it more often. Many sumps use a 4 inch ring sock, so check your outlet size first.

Is a 50 micron or 100 micron filter sock better?

Neither is better in every case. A 50 micron sock catches finer particles and gives clearer water, but it blocks sooner and needs changing more often. A 100 micron sock holds more debris and keeps flow steadier, which suits most sumps day to day.

Can a filter sock be too fine for my tank or pond?

Yes. A sock that is too fine clogs quickly, slows the flow and can cause water to back up in the overflow. If your sock blocks within a day or two, move one rating coarser, or add a coarse sock ahead of the fine one.

What does a 200 micron filter sock catch?

A 200 micron sock has openings around 0.2 mm, so it catches visible debris such as uneaten food, leaf fragments and larger detritus. Finer particles pass through. It suits heavily stocked tanks, ponds and coarse pre-filtering.

Should I use felt or nylon mesh for my filter sock?

Use nylon mesh if you want a precise cut-off and a sock you can rinse and reuse, as in most aquariums and ponds. Use felt if you need to catch fine and varied particles, or if the liquid is hot, oily or chemical. Felt is a consumable, so you replace it rather than wash it.

Can I order a micron rating that is not in the shop?

Yes. We make 1, 5, 10, 25, 75, 300 and 600 micron socks to order, and we can also quote custom sizes and size 1 to 4 bags for filter housings. Send us the details and we will quote within one working day.

Filter socks and bags, dispatched from Leeds

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Aqua Filter Socks

What micron filter sock do I need? A UK buyer’s guide to choosing the right rating
For most aquarium sumps, a 100 micron nylon mesh filter sock is the right starting point. Move to 200 micron if the water carries heavy debris, or down…