So im thinking of adding a sponge filter to my 35gallon, would this filter be good?
http://cgi.ebay.com/Aquarium-Fish-Tank-Super-Biochemical-Sponge-Bio-Filter_W0QQitemZ120435544813QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1c0a8492ed&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1205|240%3A1318|301%3A1|293%3A1|294%3A50
and what air pump should i use to run it? A 30 gallon air pump?
PS: the sponge filter is just to get rid of some free swimming snail poop and something along those lines, if possible can i run a weaker sponge filter instead of the 30gallon rated?
http://cgi.ebay.com/Aquarium-Fish-Tank-Super-Biochemical-Sponge-Bio-Filter_W0QQitemZ120435544813QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1c0a8492ed&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1205|240%3A1318|301%3A1|293%3A1|294%3A50
and what air pump should i use to run it? A 30 gallon air pump?

PS: the sponge filter is just to get rid of some free swimming snail poop and something along those lines, if possible can i run a weaker sponge filter instead of the 30gallon rated?