- Penn Plax 40 55 Gallon Aquarium Premium Under Tank Filter
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- Excellent overview of the best of what California has to offer
Amazon Price: $17.99 (as of July 16, 2018 5:55 am -
Under Gravel Filter for 5.5 Gallon Aquariums. For crystal clear water * Jumbo 1 Adjustable lift tube * 7.5 x 15.5 *Convenient, trouble-free maintenance!