Easy to set up/takes up little space along the bank/bubbles great. The fish seem a little timid to come very close but I'm sure they will get used to it. I'm feeding them in a different area so they arent' scared. I see this as a necessity to any sized pond after we experienced "pond inversion" couple wks ago & lose 10 very lg fish - one was almost 25yrs old! After talking with Ellen, I understand now about the importance of added oxygen - I don't ever want to go thru this type of loss again! Thanks Ellen for all your help! Dr. Jo