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If you don't keep it changed often it will be a problem. You really shouldn't use a cannister filter. They will absorb waste products and then release nitrates.
WITHOUT nitrate issues of any kind 


To answer the OP's question. You can use pretty much any type of filtration media as long as you keep it cleaned, by rinsing it on a weekly bases I think thats probaly what i recommended but if you read other posts about using a cannister filter on a reef tank you will find there are better options.![]()

Buy your poly from Walmart, less than $4, use & toss
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Sent by the power of gray skull!!


