I don’t know much about these contraption’s as I’m not technically a ‘fish aquarium connoisseur’. So when it said up to a certain gallon—I said: “go for it Marie...make your little ‘kid fishys’ happy.I have a 20 gallon tank.Lemme just warn you—Don’t. Just DON’T...do it.I had to giggle at first because it literally ‘blew’ my poor baby’s to tha’ side of tha’ tank! I’m thinkin’ boy are they getting a great aerobic workout. But then I got scared.They could not move! Wayyyyy to strong and my poor ‘Ghost Shrimp’....well—may they rest in “Ghost Shrimp Heaven’. Only 1 left and when I last checked...it was still holding on to what it thinks—is a tree.Also, box instructions says there is supposed to be a magnet to attach to the outside to hold tha pump???? Ugh....who writes these dang instructions and...WITH misspelled words???? There was no magnet you...you ole’ “power wave pump people from China you”!!!!And that dang suction was ‘suck’ at first, as it kept falling down but I gave it some ‘Dewayne Johnson’ pressure and that worked but then—I almost couldn’t get tha’ dang thang to loosen off tha’ glass to remove it and pack it up.My fish screamin’, while I’m lookin’ at them in a panic, all tha’ while tryin’ to pull tha’ thang out while—WHILE mind you— not crackin’ tha’ glass.This thang bout as confusing as a man. Sheesh.It’s extremely quiet but seeing I removed it after about 8 minutes...I can’t vouch for that being maintained.Back in tha’ box and sendin’ it back. Works a little TOO well—for a 20 gal.Look like a dang monsoon in there.My live plants all uprooted.Took a few hours but my babies finally forgave me cause they...was...P’od at me. I think.I told em’—“momma, was just tryin’ ta’ help”.But they wasn’t tryin’ to hear none of that.So if yo’ tank bigger... ughhhh....yeah.