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> Penn-Plax Undergravel Media
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Penn-Plax Undergravel Replacement Media
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Penn-Plax Ammonia-X 6-Pack
Penn-Plax "E" Ammonia-X Undergravel Filter Cartridge, 6-Pack
Our Price: $8.99
You'll earn 45 points
(Out of Stock)

These Penn-Plax Ammonia-X "E" Undergravel Filter Cartridges fit the Penn-Plax Premium Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 6-Pack (three 2-Packs)
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info
Penn-Plax Ammonia-X 2-Pack
Penn-Plax Ammonia-X "E" Undergravel Filter Cartridge, 2-Pack
Our Price: $3.29
You'll earn 20 points
(Out of Stock)

These Penn-Plax Ammonia-X "E" Undergravel Filter Cartridges fit the Penn-Plax Premium Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info
Filt-a-Carb E Carbon Cartridge Penn-Plax
Penn-Plax Filt-a-Carb "E" Carbon Undergravel Filter Cartridge, 2-Pack
Our Price: $3.29
You'll earn 20 points
(Out of Stock)

These Penn-Plax Filt-a-Carb "E" Carbon Undergravel Filter Cartridges fit the Penn-Plax Premium Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
more info
Penn-Plax Filt-a-Carb E Carbon Cartridge 6-Pack
Penn-Plax Filt-a-Carb "E" Carbon Undergravel Filter Cartridge, 6-Pack
Our Price: $8.99
You'll earn 45 points
(Out of Stock)

These Penn-Plax Filt-a-Carb "E" Carbon Undergravel Filter Cartridges fit the Penn-Plax Premium Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 6-Pack (three 2-Packs)
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
more info
Filt-a-Carb Undertow & Perfect-A-Flow Carbon
Penn-Plax Filt-a-Carb Undertow & Perfect-A-Flow Carbon Undergravel Filter Cartridge, 2-Pack
Our Price: $3.29
You'll earn 20 points
(Out of Stock)

These Penn-Plax Filt-a-Carb Carbon Undergravel Filter Cartridges fit the Perfecto Perfect-A-Flow and Penn-Plax Undertow Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
more info
Filt-a-Carb Undertow Perfect-A-Flow Carbon 6-Pack
Penn-Plax Filt-a-Carb Undertow & Perfect-A-Flow Carbon Undergravel Filter Cartridge, 6-Pack
Our Price: $8.99
You'll earn 45 points
(Out of Stock)

These Penn-Plax Filt-a-Carb Carbon Undergravel Filter Cartridges fit the Perfecto Perfect-A-Flow and Penn-Plax Undertow Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 6-Pack (three 2-Packs)
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
more info
Penn-Plax Filt-a-Carb Universal Carbon Cartridge
Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridge, 2-Pack
Our Price: $4.29
You'll earn 25 points
(Out of Stock)

These Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridges fit most undergravel filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
  • Fits 11/16" & 27/32" lift tubes very loosely. Fits 15/16 lift tubes very snug. With 1-1/8" lift tubes it fits inside the tube.
more info
Penn-Plax Universal Carbon Cartridge 6-Pack
Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridge, 6-Pack
Our Price: $11.49
You'll earn 60 points
(Out of Stock)

These Penn-Plax Filt-a-Carb Universal Carbon Undergravel Filter Cartridges fit most undergravel filters. For best results the Cartridge should be replaced every two to four weeks.
  • 6-Pack
  • Top quality activated carbon
  • Removes harmful gases & odors
  • Clears up unsightly discoloration
  • Fits 11/16" & 27/32" lift tubes very loosely. Fits 15/16 lift tubes very snug. With 1-1/8" lift tubes it fits inside the tube.
more info
Penn-Plax Undergravel Upgrade Kit
Penn-Plax Undergravel Upgrade Kit
Our Price: $5.99
You'll earn 30 points
(Out of Stock)

The Penn-Plax Undergravel Upgrade Kit is for converting all 1" lift tube undergravel filters (Perfecto, Aquology, Hydroclear, etc.).

Includes:
  • TWO Filt-A-Carb (FC4) Disposable Carbon Cartridges containing top quality activated carbon to remove harmful gasses, odors, and unsightly discoloration
  • TWO Fishguards, molded right into each elbow, for preventing fish from entering the lift tube
  • TWO Gravelguards for preventing gravel and fish from getting under filter plates when lift tubes are removed.
more info
Penn-Plax Ammonia-X 2-Pack
Penn-Plax Undertow & Perfect-A-Flow Ammonia-X Undergravel Filter Cartridge, 2-Pack
Our Price: $3.29
You'll earn 20 points
(Out of Stock)

These Penn-Plax Ammonia-X Undergravel Filter Cartridges fit the Perfecto Perfect-A-Flow and Penn-Plax Undertow Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info
Penn-Plax Ammonia-X 6-Pack
Penn-Plax Undertow & Perfect-A-Flow Ammonia-X Undergravel Filter Cartridge, 6-Pack
Our Price: $8.29
You'll earn 45 points
(Out of Stock)

These Penn-Plax Ammonia-X Undergravel Filter Cartridges fit the Perfecto Perfect-A-Flow and Penn-Plax Undertow Undergravel Filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack (three 2-Packs)
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info
Penn-Plax Ammonia-X 2-Pack Universal
Penn-Plax Universal Ammonia-X Undergravel Filter Cartridge, 2-Pack
Our Price: $4.29
You'll earn 25 points
(Out of Stock)

These Penn-Plax Universal Ammonia-X Undergravel Filter Cartridges fit most undergravel filters. For best results the Cartridge should be replaced every two to four weeks.
  • 2-Pack
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info
Penn-Plax Ammonia-X 6-Pack Universal
Penn-Plax Universal Ammonia-X Undergravel Filter Cartridge, 6-Pack
Our Price: $10.99
You'll earn 55 points
(Out of Stock)

These Penn-Plax Universal Ammonia-X Undergravel Filter Cartridges fit most undergravel filters. For best results the Cartridge should be replaced every two to four weeks.
  • 6-Pack (three 2-Packs)
  • Top quality zeolite for eliminating the number one fish killer, ammonia
  • Cuts down disease problems
  • Solves overfeeding, over-crowding and foul water conditions
more info