what do you guys think about this? and how much do you think is needed for a 55 gal barrel?? do you think the sponge in the middle is a problem?
http://cgi.ebay.com/New-Type-Bio-Ba...tem&pt=LH_DefaultDomain_0&hash=item43a03f298a
or is this better?
http://cgi.ebay.com/BIO-BALLS-AQUAR...tem&pt=LH_DefaultDomain_0&hash=item4aa2c47883
http://cgi.ebay.com/New-Type-Bio-Ba...tem&pt=LH_DefaultDomain_0&hash=item43a03f298a
or is this better?
http://cgi.ebay.com/BIO-BALLS-AQUAR...tem&pt=LH_DefaultDomain_0&hash=item4aa2c47883
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