Spec-by-spec
Head to head
Contenders from Automatic Pet Water Fountains, every metric lined up. The winning value in each row is outlined.
PetSafe Multi-Tier Pet Fountain 100oz – Accessible Two-Height Waterer for Senior Pets #3 in Automatic Pet Water Fountains 
PetSafe Oasys 2 Gallon Pet Fountain — Large-Capacity Plastic Fountain for Dogs #22 in Automatic Pet Water Fountains Price
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Check price on Amazon →
Rating
★★★★★
★★★★★
Category rank
#3
#22
Filtration Quality
—
—
Reservoir Capacity
100oz – ample for 1–2 pets, 2–3 days typical
2 gallons / 256 oz
Pump Noise
—
—
Ease of Cleaning
Top-rack dishwasher-safe; moderate assembly required
Top-rack dishwasher-safe, simple design
Verdict
Best multi-tier fountain for senior & arthritic pets
Best large-capacity fountain for multi-pet households
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