"This fountain is great. I change the filter once a month
and my cat has constantly circulating fresh water. I also clean the air pump once a week with sudsy water and a potato brush, then flushing with warm water. The air pump is secured to the base by four suction cups and comes apart/goes back together again for easy cleaning. The other plastic parts clean easily with warm sudsy water and lots of rinsing. I refill with already filtered water every couple of days and my cat loves this product!!!"