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Home » Brands » All Brands » Penn-Plax » Penn-Plax Smallworld Replacement Filtration Units 2pk. #SWF-1C
Penn-Plax Smallworld Replacement Filtration Units 2pk. #SWF-1C

Penn-Plax Smallworld Replacement Filtration Units 2pk. #SWF-1C

Item #: 030172390050
Reg: $5.49
Sale: $4.12
You Save: $1.37 (25%)
  • Description
  • Reviews
Penn Plax Smallworld Replacement Filtration Units removes harmful gases, odor and discoloration. Contains 2 filtration units.


  • Disposable, quick and easy
  • Each cartridge keeps aquarium water looking crystal clear for 2-4 weeks
  • Designed to fit Smallworld filter unit (#SWF-1)
14 Reviews
86% (12)
14% (2)
0% (0)
0% (0)
0% (0)
100% Recommend this product (14 of 14 responses)
By Michelle
December 22, 2018
Great prices!
ProsGreat price!
By Judy
February 22, 2018
Customer service
One of the best customer service experiences that I've had. Thank you pet guys
By Bethany Rawley
August 24, 2017
Great stuff
These are the best filters that I've ever used.
By dwight
September 30, 2016
Far cheaper than Amazon
Was able to buy 12 of the filters for the price Amazon had for 6.
By Jacque Kendall
September 23, 2016
Great product
Fast shipping and handling
By carltongagnon
plainville, CT
April 22, 2016
i may order more on sale in a few days!
Not available in national popular pet supermarkets at double the cost. shipping charges okay!
By Dan
Wheeling, WVA
January 8, 2016
Ideal for small tank or bowl
Housing a Beta in your cookie jar? This small filtration system, low maintenance and very effective, will keep your Beta alive for years to come.

I switch out the filter once every two weeks, and it works just fine. (I have four fish in a glass cookie jar -- including one huge Beta.)
ProsEase of maintenance; can be used in small water vessels.
ConsBest fitted to a square tank, with flat surface.
By Meg
Miami, FL
May 7, 2014
Great service!
The item is exactly what i was looking for and arrived very fast...
Yardley, PA
January 30, 2013
in tank filter
Can't find yhese filters anymore. The filters work great with my inclosed tank. My tank lid won't allow any overflow filters on any filter that need an above surface. with these filters al you need is a flat surface in the tank and an air pump.
ProsQuick change, simple
Consfloss stage is a bit small
By Peggy
Princeton, Ks.
August 4, 2012
Smallworld Replacement Filters
I have used Smallworld replacement filters for several years in two small 2gallon tanks. They do a good job, are easy to change, and most other filters are too large.
ProsSee above
By Leanne
Long Beach, WA
May 29, 2012
These work great!
These filters work wonderfully!
By Jackie Carroll
Virginia beach, Va. 23462
April 2, 2012
PennPlaxx small world Replacement Filtration Units 2pk
I love these I have used them for years
ProsThey are so easy to take out and put into the unit that filters the fish water
By Christine Bowles
Mena AR
June 2, 2011
Great Service
Very good value, fast service they even called me on the phone to clarify my state, will recommend and will buy again from the guys.
By D. J.
Tampa, FL
May 24, 2011
Order of fish tank filter replacements
Acceptable. As described, good price, and arrived at the house quickly.
ProsPrice and rapid shipment
ConsNot well packaged.