All Water Types 20 gal. Tank Capacity Aquarium Undergravel Filters
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RA Premium Under Gravel Filter - 15/20 gal
C $80.14C $22.01 shippingLees Original Undergravel Filter 24 Long x 12 Wide (15-20 Gallons)
C $22.08Was: C $31.53or Best OfferC $26.23 shippingRA Under Gravel Filter - 15/20 gal
C $57.08C $6.86 shippingRA Premium Under Gravel Filter - 15/20 gal
C $61.80Only 1 left!Vintage NOS Undergravel Aquarium Filter MIRACLE FILTER in Box for Fish Tank
C $12.36C $40.34 shipping14 watchingPenn-Plax Undergravel Aquarium Filter for 15-20 high Gallon Tanks – Two 11.2”...
C $19.25C $20.21 shipping20 Gal Undergravel Aquarium Filter 2 Plate System Aquarium Outfitters
C $28.84or Best OfferC $20.48 shipping