Tetra Whisper® Aquarium Air Pump A&E Lightweight clay substrate can be

Lightweight clay substrate can be used as a base layer underneath coconut fiber substrate to create underground water table

Stand will fit both 20 and 30 gallon combos

Non-Stick Surface: Eliminates litter caking and odor buildup

dual lcd display

Extra Large:

Tetra Whisper® Aquarium Air Pump A&E Lightweight clay substrate can beMinimal noise, maximum air flow. The Whisper Air Pumps dome shape actually flattens sound wave frequencies. In addition, each model features sound dampening chambers designed specifically for that model. And the air pump's rubber feet and suspended motor prevent sound waves from reflecting off surfaces such as tables and shelves. Available in models for aquariums from 10 to 100 gallons, Whisper Air Pumps provide a powerful flow of air. UL listed.