SunGrow 55 GPH 3W Small Submersible Water Pump, Fits all Cat & Dog Water Bowl, & Most Fountains, Aquarium Fish Tank Mini Submersible Pump, Hydroponics, Tabletop Fountain, For 3-5 Gallons Tank

This thing was way smaller than I anticipated. it fits very comfortable in the palm of my hand, but it does provide some flow to my 20 Gallon. however, the current is only strong enough to be felt about 5-7 inches away from the device

Works great and it was very inexpensive. I can barely hear it in the room, just a little hum.

Pump works well, but it is much noisier than expected. It's in a heavy ceramic pet bowl, and there's no way I'd use it with something lighter like lightweight stainless steel. It would just be too noisy.

I use it for a DIY pet drinking fountain. I use it on almost the lowest strength pump & with 2 different hoses so the animals have choices of if they want to drink from the bowl, the trickle of the globe that the pump sits inside of, or the light fountain. I have 3 cats and a small dog this way they all drink from the same place & I no longer feel I have to keep the faucet running.

Don't use this to move water up from one container to another (as in a tiny sump), it won't work. However, it did work great to generate a small current in my ten gal. aquarium that my fish love. The suction cups that they come with don't work at all. They would hold the pump to the wall of the aquarium for maybe five minutes before it would fall off. The pump though works pretty well.

EDIT: PRODUCT STOPPED WORKING EXACTLY ONE MONTH LATER.This product is tiny, as the description suggests. I am using it for a hydroponics tank and it is doing what it needs to, however the suctions dont work. Thankfully it isnt a problem that it's just sitting at the bottom of the tank. Powerful for how tiny it is, in a 3-5 gallon tank.

It’s loud for being little. Small suction cup. I have to leave it in some plants or it’s to noisy. Only one I could find for my size tank

This little guy came out of the package and worked like a champ! Exactly what we needed for a tiny nativity well set. I think the pump itself is only maybe an inch wide and long, but might be a little off. It’s very small. It produces the right amount of section for what we needed. I’m so glad I found it!