Replacement carbon wool intended for use with the Ocean Free Hydra Filtron external filters. Carbon wool filters out harmful liquid substances from the water, such as heavy metals, odours, discolorations, pollutants and toxins. It is worth noting that the carbon will also strip out most fish medications and treatments so you should remove the carbon if you need to treat the fish for any illness. These pads should be replaced approximately every 4 weeks.
Available for the 1000, 1500 and 1800 external filters. Sold in packs of 3.
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