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 1-Gallon Plastic Pet Fountain with Multi-Stage Filtration #28 in Automatic Pet Water Fountains Price
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Rating
★★★★★
★★★★★
Category rank
#3
#28
Filtration Quality
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Reservoir Capacity
100oz – ample for 1–2 pets, 2–3 days typical
128 oz / 1 gallon
Pump Noise
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Ease of Cleaning
Top-rack dishwasher-safe; moderate assembly required
Dishwasher-safe, multiple parts
Verdict
Best multi-tier fountain for senior & arthritic pets
Trusted mid-range fountain with proven reliability
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