It isn't any harder cleaning 2 sponges instead of 1. Fill a bucket with tank water, lift out the plastic housing, and gently squeeze the sponge(s)... the 110 actually takes less time than my 70 because I don't have to put media bags in the tank or cut a new sheet of poly. Besides, there's nothing better to do while refilling the tank anywaysDouble sponge=double waste collectors=double maintenance
