For estate-sized 45,000-gallon pools, a 94 GPM flow rate is critical for sanitation. We exclusively recommend the Black+Decker 3.0 HP Variable Speed pump paired with our largest 525 Quad Filter Tank. This commercial-spec combination ensures that even at extreme volumes, your water remains crystal clear. The four-cartridge 'Quad' design provides the maximum possible filtration area, allowing you to run your system at energy-saving speeds while maintaining perfect water health.