I purchased an AquaClear 110 HOB for my 60 gallon tank. This filter is huge. But I’ve never had a tank larger than 20 gallons before. The instructions say to replace the foam filter every two months, activated carbon Insert every month and the bio max insert every three months. Is this a marketing gimmick or should I follow these directions religiously for proper maintenance of the HOB system? Can’t I just wash the foam and bio max components in tank water every month and do replacements at longer intervals?