I have a 20,000 gallon in ground pool. Currently have Hayward C900 cartridge filter (90 sq ft- 90 GPM) and a StaRite 3/4 pump. Both were installed by Leslies. I run my pool pump 7-8 hours a day in summer. A pool service came out to replace booster pump for my polaris and said my filter is way too small for my pool and that I should install a larger filter. My question is do I have the right size filter and pump for my pool? If I install a larger filter, won't I need a larger pump also?