we just bought our first home 2 years ago.it had a pool when we bought it,but were not given any info about pool ownership from the previous owners.this year our motor is extremely loud and making vibrating noises that im sure the neighbors are loving.the motor is 1.5 hp and the date on it is 2009.should we stay with the same hp?we know very little about pool maintenance and are trying our best.we are looking for a very cheap option but arent sure what would be best.we dont even know the size of are pool,were guessing 30 feet and its round.thank you for any advice