The Tom Aquarium Products Auto Fill System is an automatic, hassle-free way to easily replace water evaporation in an aquarium. The Auto Fill System automatically replenishes up to four gallons of evaporated aquarium water directly into a sump or wet/dry filter.

• 18" Tall X 8" X 16"
• A 3/4" female threaded fitting in the sump or wet/dry filter is required
  

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