Hello everyone i am new to the forum, i just bought a pool and rcvd it 2 days ago. I have been reading everything possible on this site for the past 2 weeks and have found alot of useful information...After everything i read i have somewhat of an idea of what type of pump and filter i would like to buy just would like to know other opinions....At the moment i have a 12 x 18 above ground pool which is supposed to hold approx 4500 gallons i was thinking on purchasing the Hayward Power-Flo II 1/2 HP Single Speed Pump and a Hayward Star Clear Filter 25 Sq Ft 1-1/2" Ports...i have read that its good to have a dual speed pump for cleaning, etc...just would like to know if i should purchase a dual or single speed...i want to keep the energy usage low on the pool....Any input would be appreciated and thank you all for the great info that has been posted here.