The Eheim has an 80 Watt pump, the FX5 has 50 Watts - Which one do you think will keep up the flow rate even with media and even when the filter starts to clog
The Eheim 2262 Pump and the Fx5 Pump both have marginally the same flow rates, with the Fx5 topping out more.
The Fx5 pump does not need all the extra power due to the highly efficient impeller used, where as the Eheim pump uses an impeller which is not as efficient which is one of the reasons why it needs more power to move the same amount of fluid. I have noticed that pumps with straight blade impellers, spin MUCH faster then the pump used on the Fx5 which puts out a higher flow rate.
Now the Classic 2260 series should not clog as quick as the Fx5 when using small partical filtration pads because it has nearly 96% MORE surface area for
small partical filtration.
The Fx5 has nearly 60% MORE surface area for
coarse mechanical filtration though.
So the Classic 2262 probably will not clog up as quick, but even if it did, the pump consuming 80 watts of power doesn't mean it will hold flow longer.
I would really like to know the actual filter flow output of the Eheim Classic 2260 Series with the 2262 pump. IF anyone has one, do a simple flow test with a 5 gallon bucket, or any bucket of known size. I HIGHLY doubt its anywhere near 900 GPH. I even doubt its above 800 GPH. My new guess after thinking for awhile is 500-700 GPH. Afterall, when does Eheim ever have a canister with a high flow rate?