How often do I need to refill the 2.5 L tank?

For one cat, roughly every two to three days; two cats or a small dog will empty it faster. Top it up before the level drops near the pump intake.

Can it run from a power bank?

Yes. The USB pump works from a phone charger, power bank or laptop port, which is useful during outages or away from an outlet.

Does it filter the water?

Most units of this type include a small carbon or sponge filter in the pump path. It catches hair and debris but is not a substitute for changing the water.

Is it big enough for a dog?

It suits cats and small dogs. Medium or large dogs will drain the tank quickly and may knock the light unit over.

How often should I clean the pump?

Take the pump apart and rinse the impeller about every two weeks, and replace the filter monthly, to keep flow strong and quiet.

Where is the 2500ML USB Pet Water Fountain cheapest?

At Deal.ai, for $41.60, as of our latest check.

2500ML USB Pet Water Fountain

Sold and shipped by Deal.ai

$41.60Free shipping

Color: White

Arrives about Nov 14–23, from a US warehouse

No returns for change of mind. If it arrives damaged or isn't what you ordered, or never arrives, report it within 30 days and we refund you in full.

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Price facts

Last seen at $41.60 at Deal.ai on Nov 8.

Our take on the 2500ML USB Pet Water Fountain

This is a 2.5-liter (about 84 oz) plastic pet fountain with a USB-powered pump, sized roughly 7.3 by 7.3 by 6.7 inches and weighing about 1.6 lbs. The large tank means fewer refills than the 1.5- to 2-liter bowls most budget fountains use, and USB power lets it run from a phone charger or power bank instead of a wall outlet. It suits cat and small-dog owners who want circulating water without a bulky plug-in unit. Against rivals, it lacks the filtration depth, stainless-steel contact surfaces and smart alerts of premium fountains, and the pump is the part most likely to need cleaning or replacing.