Review on ESHOPPS MANUFACTURER AQUARIUM FILTRATIONS Rectangular by Brooke Parker

<p>The second best thing after filter socks, the Bio Cup R complements your traditional filter socks for stress-free reefing. Not only is it reusable, but it can be easily inserted and removed when changing filter pads, so your water is always crystal clear. It acts as a filter media basket that can hold different types of filter media such as filter yarn, filter foam and pads, carbon, GFO and biomaterials such as ESHOPPS Bio Lux. It fits perfectly in any 4" x 7" filter media rack and stacks easily with a variety of media types. </p>