carbon and gfo


Filter Media + Accessories

filter media socks and holders illustration

Ultra Carbon 410

Simplicity Ultra Carbon 410 is a superior sub-bituminous carbon which quickly and effectively removes pollutants that cause odors, discoloration and haziness in aquarium water. This can help improve livestock health and purify and clarify aquarium water.



High phosphate levels in a reef aquarium cripple coral growth and fuel algae. Simplicity GFO (granular ferric oxide) adsorbs these phosphates from the aquarium rendering them harmless leading to improved coral health, coloration and reduced algae growth. Works best when used in a media reactor with a gentle tumble. It can also be used in a media bag placed in a high flow area like the sump.

Filter Socks & Holders

Simplicity filter socks are made in the USA from high quality, durable materials. They are available in a variety of sizes and styles.

Pair our filter socks with Simplicity filter sock holders, or any 4” or 7” holder with a plastic ring.

Felt filter sock with ring

Felt Filter Sock
with Plastic Ring

durable plastic ring
200 micron
Available Sizes:
4 in. x 14 in.
7 in. x 16 in.

Felt filter sock with drawstring

Felt Filter Sock
with Drawstring

easy to close drawstring
200 micron
Available Sizes:
4 in. x 14 in.
7 in. x 16 in.

Mesh filter sock with ring

Mesh Filter Sock
with Plastic Ring

durable plastic ring
200 micron
Available Sizes:
4 in. x 14 in.
7 in. x 16 in.

Filter Sock Holder

Filter Sock

durable black plastic
for tanks up to 1.75” thick
fits most filter socks w/ rings
Available Sizes:
4 inches
7 inches

Helps Keep Water Clear

200 micron material helps make your water look crystal clear and helps reduce nutrients by removing free-floating debris.

Equipment Saver

Catches snails, algae and other large debris before it can enter your sump and damage your pumps and other equipment.

Made in the U.S.A.

Made in the U.S.A. from high-quality, durable materials.

Filter Sock Highlights


Our felt filter socks can be turned inside out, washed in bleach and used again.
Be sure to completely dry out sock before placing back into use on an aquarium.

Universal Compatability

Fits any standard 4″ and 7″ filter sock holders and sumps.

Buy in Bulk and Save

Save more when you buy our bulk 20-packs or 100-packs.

Universally Compatable

Our durable construction and effective design mean you can count on this part to work well for a long time, at a price that works for you.

Equipment Saver

Works with standard plastic rim aquariums and any 4 inch or 7 inch round ring-top filter sock.

Filter Sock Holder Highlights

Turns an Aquarium into a Sump

Convert a standard aquarium into a sump by adding a filter sock holder and filter sock to one side of the tank.


The adjustable nylon screws hold the bracket steady and level on aquariums up to 1.75 inches thick.

Lifetime Support based in the USA

USA Support

Our products come with
unlimited lifetime support
based in the U.S.A.

Satisfaction Guarantee

Satisfaction Guaranteed

If you're not happy, please bring the
product back to your place of purchase
for a refund or replacement.

our promise

Our Promise

It’s simple.
We promise to be there
when you need us.