Penn-Plax Fish & Aquariums 20 gal. Tank Capacity for sale

New ListingPREMIUM UNDER GRAVEL AQUARIUM FILTER Fresh Salt Water Safe 20 - 29 Gallon Tank
Brand New · Penn-Plax
$23.49
Free shipping
+R^ V QW &A* ]T ZY w.?!|/ $ S p o n s o r e d
CASCADE 20 MINI POWER FILTER 20gph UP TO 7gal
Brand New · Penn-Plax
(7)
$28.97
Free shipping
103 sold
+9^ P& *5I F ] 0w. K0?!|/ K $S p o n s o r e d
Cascade 400 Penn Plax Internal Filter New Old Stock Up To 20 Gallons
Brand New · Penn-Plax
$30.00
or Best Offer
$8.50 shipping
7+I^ B&*2 ] w.N?R!|/ 99 $S p o n s o r e d
Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up To 20 Gallon Fish
Brand New · Penn-Plax
$50.27
Free shipping
+O^4 &*1W ] 2R wR.7?!| / $S p o n s o r e d
New 3-Pack Cascade Bio-Sponge Replacement Internal Filter Sponge CIF1FI
Brand New · Penn-Plax
$10.29
Free shipping
HY +^J &* ]X 9 0w. ?!A|V BX / $
Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11....
Brand New · Penn-Plax
(22)
$20.87
Free shipping
Only 1 left!
+^ &*I1 3 ]6 8wF .?!|/L $H
Aqua Life Aquarium Tank Divider Fits 20 gallon 11 3/8" x 15 1/2" Extra Large
Brand New · Penn-Plax
(2)
$13.59
Was: $16.99was - US $16.99
$5.99 shipping
2 watching
+0W ^ &*LH ] 7wO.?! |8/ $2
Cascade 100 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack
Brand New · Penn-Plax
(2)
$7.84
Free shipping
+^A &T *X V] w .?!5|/ $Y
Penn-Plax Silent-Air Aquarium Air Pump - 20 Gal
Brand New · Penn-Plax
$29.97
or Best Offer
Free shipping
R+I ^L &M* ]H w.?!|A/ $
Cascade 300 Internal Bio Sponge
Brand New · Penn-Plax
$7.69
Trending at $7.99
Free shipping
+^ &5U* RO ] w.B3 I8 HI? !|/ $
Undergravel Aquarium Filter for 15-20 (High) Gallon Tanks – Two 11.2” X 11.25” P
Brand New · Penn-Plax
$21.76
Free shipping
BA+^ &IB* ] 2Jw.? 7!|F GU/ $
TANK DIVIDER LRG 11.5x11.5in BOXED
Brand New · Penn-Plax
(1)
$14.97
Free shipping
TB H+^I & F* ] wU.? !YZ| / $
Cascade 400 Internal Bio Sponge
Brand New · Penn-Plax
(1)
$9.69
Free shipping
I+W^ &3* B] W3w. ?!|/ $
GRAVEL VAC 16in CANISTER 72in SLEEVED
Brand New · Penn-Plax
$32.97
Free shipping
+^ 9Z&* ] 0Fw .CT ?G1 A!K| / $S p o n s o r e d
CASCADE 100 POWER FILTER cUL BIO-FALL
Brand New · Penn-Plax
(17)
$40.99
Free shipping
+R^ 0 N&A * ]Q 6 w.QJ? O!A |/ $S p o n s o r e d
Penn Plax Cascade 400 Aquarium Filter Cleans Up to 20 Gallon Fish Tank With P...
Brand New · Penn-Plax
$50.13
Free shipping
HQ+ O^ &1 * ] GIw J.?Q!|/ $S p o n s o r e d
Penn Plax Air Pod Aquarium Air Pump Ultra Quiet Compact Dome Shape 20 gallon
Brand New · Penn-Plax
(1)
$14.39
Was: $17.99was - US $17.99
$5.99 shipping
+^ &T*P 7X A ] wX.?!|/ 0 O$
Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1”...
Brand New · Penn-Plax
$22.99
Free shipping
O+^ &* ]T w.0L? 1!|S/ 22 $
Cascade 100 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack
Brand New · Penn-Plax
(2)
$6.74
Free shipping
E6+^ & * ] wU.S?!|/ $YI U
Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25...
Brand New · Penn-Plax
(22)
$20.23
Trending at $20.87
Free shipping
+^ &* ] wBQ.?! 9|B QK /2 H$
Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1FI New!
Brand New · Penn-Plax
$8.00
Free shipping
+^ NU& * ] wB.D ?!B|/ $K
GRAVEL VAC NANO EACH
Brand New · Penn-Plax
$14.97
Free shipping
+^53 &* G6 ]4R 3H w.? !A|/V $
Air-Tech Aquarium Air Pump | Quiet and Reliable | for Fish Tanks Up to 20 Gal...
Brand New · Penn-Plax
$16.89
Free shipping
Only 1 left!
+E^ &* W] wQ.S QV? M4!|/ V$
Penn-Plax Cascade 300 Filter Replacement Bio-Sponge (1 Sponge) – Provides
Brand New · Penn-Plax
$6.86
Trending at $7.99
Free shipping
+UM T^ J& * ] wS0.? !|/N $
2 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!
Brand New · Penn-Plax
$15.95
or Best Offer
Free shipping
+^ V&*L T U] w.D?C !ZN|/ $
Penn-Plax Silent-Air Aquarium Air Pump - 20 Gal
Brand New · Penn-Plax
$30.62
Free shipping
+^ W&B* ] w.?!|/ S$B PM
CASCADE 100 POWER FILTER cUL BIO-FALL
Brand New · Penn-Plax
(17)
$19.99
or Best Offer
$13.10 shipping
+6M 8^P & Y* ]7 Ow.5 ?!2|/M $
Undergravel Aquarium Filter 20/15 Gallons 2 Filter Plate System 23”x11 1/2” New
Brand New · Penn-Plax
(22)
$15.87
$10.00 shipping
+^T5 &* ] w1.?E !X|C/ $
Penn plax Cascade Heat Aqauarium Heater 20 gallons 100 watt
Brand New · Penn-Plax
$12.79
Was: $15.99was - US $15.99
$5.99 shipping
+^ &06 M*O ]P w.?!6 7Z |/OK $S p o n s o r e d
Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank Physic
Brand New · Penn-Plax
$49.88
Free shipping
+^BH G&*U ]Z I w.?1!|/ P $S p o n s o r e d
GRAVEL VAC 24in CANISTER 96in SLEEVED
Brand New · Penn-Plax
$40.97
Free shipping
+^ T&* F] w.?!|5Y T8 / $7S p o n s o r e d
Penn Plax Cascade 400 Aquarium Filter Cleans Up to 20 Gallon Fish Tank With P...
Brand New · Penn-Plax
$51.47
Free shipping
+^ &H*7 ] w.I2? P!6 JX|/ $S p o n s o r e d
Filter Cartridge ~ Fish Tank ~ 2/Pack ~ Penn-Plax ~ Betta World ~ D
Brand New · Penn-Plax
(29)
$7.00
or Best Offer
$6.15 shipping
S+^ &* P] IW wX.?!V|/ $F0
Penn Plax Cascade Submersible Heat Aquarium Heater
Brand New · Penn-Plax
(6)
$20.99 to $27.99
$6.99 shipping
ST+ ^ &M*W ] w1B.? !|GE/ 6$
Plax 400 Aquarium Filter for 20 Gallon Tank CIF2 Physical Biological Filtration
Brand New · Penn-Plax
$52.57
Free shipping
+^ &GV* SP] w. ?U!Z| T/ 9$
4 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!
Brand New · Penn-Plax
$19.99
Free shipping
+9T ^2 &* ]8 U6 X2w.? B!|/F $
PENN PLAX Lok-Tite Non-Corrosive Aquarium Gang Valve 4 Way # VN4
Brand New · Penn-Plax
(1)
$12.39
Free shipping
+^QE FX 4&*Z G] wN.? RC!|/ $
LM Penn Plax Cascade Submersible Heat Aquarium Heater 100 Watts - 8" Long
Brand New · Penn-Plax
(6)
$14.77
$7.00 shipping
UG+ ^ 8F& T* ] w.D?! HS| / $
Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish
Brand New · Penn-Plax
$52.19
Free shipping
+^ &*0 ] Xw.?! |Y/S 6 $M S p o n s o r e d
CASCADE PRESET HEATER 8in 100w SUBMERSIBLE
Brand New · Penn-Plax
(6)
$28.97
Free shipping
9+L^ & *V ] S w.9?R 7J! |D7/ $S p o n s o r e d
Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2”
Brand New · Penn-Plax
(22)
$21.85
Free shipping
HH+^ &*L T] 9 H 3Mw.? !|/ G$
25 Feet Clear Airline Tubing For Aquariums Flexible And Durable Aquarium Acce...
Brand New · Penn-Plax
(39)
$8.99
Free shipping
+5^ &V* 4] Uw IZ. ?X!B|/ A$
Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” P
Brand New · Penn-Plax
$21.67
Free shipping
Only 1 left!
G+^D &K*6 V] Y w.?!9|V/ $
Penn-Plax Cascade Internal Aquarium Fish Tank Filter
Brand New · Penn-Plax
$27.99 to $55.99
$6.99 shipping
+MY ^WS &*H R] w. ?QA!| / $
Penn-Plax Standard Airline Tubing for Aquariums – Clear and Flexible – Resist...
Brand New · Penn-Plax
$8.35
Free shipping
+^ N2 &*T S] XAw 47 .H?Z! |/ $
Penn-Plax Cascade 80 Aquarium Power Filter Up To 10 Gallon Hang On, New
Brand New · Penn-Plax
(17)
$19.25
$8.30 shipping
+^ O&*0 ] Ww.K 41?!| 0/K 4$
Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish...
Brand New · Penn-Plax
$51.47
Free shipping
+^9F &O1* Q] Yw.?!| 1/ $
Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25...
Brand New · Penn-Plax
(22)
$26.43
Free shipping
Only 1 left!
G6 +Z^ Q &*J Q] w.?!|/3Z 6$
Cascade 300 Filter Replacement Bio-Sponge (1 Sponge) – Provides Filtration fo...
Brand New · Penn-Plax
$16.10
Free shipping
+^ X&G* ]B w8 .N?!|C/ $
11 - Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New
Brand New · Penn-Plax
$35.00
$8.65 shipping
O+^Z & D* 6] w.? !1F|/ $6Z
LM Penn Plax Cascade Submersible Heat Aquarium Heater 100 Watts - 8" NEW Heater
Brand New · Penn-Plax
(6)
$14.99
$5.00 shipping
DN +D^ &*J ] w.?!Y|L Q/ 2 $
REP71 Penn Plax Reptology 70 In-Tank Filter Pack of 2 Replacement Sponges
Brand New · Penn-Plax
$12.99
Free shipping
+Z^E & *8Q 2 U K] w.V ?HX!|/ $
2 Penn-Plax Cascade 300 Internal Filter Bio Sponge Replacement Part# CIF1FI
Brand New · Penn-Plax
$6.99
or Best Offer
Trending at $7.99
$5.40 shipping
S+4 8^2 & *O W] w.? !|A/R Z$
Two way Outlet Air Control Gang Valve/Non Return for Aquarium Fish Tank Air Pum
Brand New · Penn-Plax
(1)
$7.99
or Best Offer
Free shipping
O+^ &V* 6 ]A w65.?! |1/ $U
Standard Airline Tubing for Aquariums Clear & Flexible Resists Kinking 25ft
Brand New · Penn-Plax
$8.50
Free shipping
2 watching
+^ &M* ] Iw. ?6N C!|A / F$6
2 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!
Brand New · Penn-Plax
$9.99
or Best Offer
Free shipping
F+^1 &*K ]F wJ6 .C?!|/V $
Penn-Plax Lok-Tite Plastic 4-Valve for Aquarium Pumps
Brand New · Penn-Plax
(1)
$11.99
Free shipping
X+^ &*F ] WwN. ?8!B| 7/5 $
Oxygen Air Line Pump Hose Aquarium Accessories Airline Tubing Fish Tank 25-Feet
Brand New · Penn-Plax
(39)
$9.21
Free shipping
Only 1 left!
9J +^5 &*T S] Dw.?! |S/ $
Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish...
Brand New · Penn-Plax
$50.13
Free shipping
+CK ^0 &A *PU ] w0.?!8 M|0/ $S p o n s o r e d
Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” X 11.1” Pl
Brand New · Penn-Plax
$41.23
Free shipping
8+W^ & 9* E] w S.L? 05! |QV / $S p o n s o r e d

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Penn-Plax Fish & Aquariums 20 gal. Tank Capacity

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205 Results

New ListingPREMIUM UNDER GRAVEL AQUARIUM FILTER Fresh Salt Water Safe 20 - 29 Gallon Tank

CASCADE 20 MINI POWER FILTER 20gph UP TO 7gal

Cascade 400 Penn Plax Internal Filter New Old Stock Up To 20 Gallons

Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up To 20 Gallon Fish

New 3-Pack Cascade Bio-Sponge Replacement Internal Filter Sponge CIF1FI

Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11....

Aqua Life Aquarium Tank Divider Fits 20 gallon 11 3/8" x 15 1/2" Extra Large

Cascade 100 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack

Penn-Plax Silent-Air Aquarium Air Pump - 20 Gal

Cascade 300 Internal Bio Sponge

Undergravel Aquarium Filter for 15-20 (High) Gallon Tanks – Two 11.2” X 11.25” P

TANK DIVIDER LRG 11.5x11.5in BOXED

Cascade 400 Internal Bio Sponge

GRAVEL VAC 16in CANISTER 72in SLEEVED

CASCADE 100 POWER FILTER cUL BIO-FALL

Penn Plax Cascade 400 Aquarium Filter Cleans Up to 20 Gallon Fish Tank With P...

Penn Plax Air Pod Aquarium Air Pump Ultra Quiet Compact Dome Shape 20 gallon

Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1”...

Cascade 100 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack

Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25...

Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1FI New!

GRAVEL VAC NANO EACH

Air-Tech Aquarium Air Pump | Quiet and Reliable | for Fish Tanks Up to 20 Gal...

Penn-Plax Cascade 300 Filter Replacement Bio-Sponge (1 Sponge) – Provides

2 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!

Penn-Plax Silent-Air Aquarium Air Pump - 20 Gal

CASCADE 100 POWER FILTER cUL BIO-FALL

Undergravel Aquarium Filter 20/15 Gallons 2 Filter Plate System 23”x11 1/2” New

Penn plax Cascade Heat Aqauarium Heater 20 gallons 100 watt

Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish Tank Physic

GRAVEL VAC 24in CANISTER 96in SLEEVED

Penn Plax Cascade 400 Aquarium Filter Cleans Up to 20 Gallon Fish Tank With P...

Filter Cartridge ~ Fish Tank ~ 2/Pack ~ Penn-Plax ~ Betta World ~ D

Penn Plax Cascade Submersible Heat Aquarium Heater

Plax 400 Aquarium Filter for 20 Gallon Tank CIF2 Physical Biological Filtration

4 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!

PENN PLAX Lok-Tite Non-Corrosive Aquarium Gang Valve 4 Way # VN4

LM Penn Plax Cascade Submersible Heat Aquarium Heater 100 Watts - 8" Long

Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish

CASCADE PRESET HEATER 8in 100w SUBMERSIBLE

Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2”

25 Feet Clear Airline Tubing For Aquariums Flexible And Durable Aquarium Acce...

Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” P

Penn-Plax Cascade Internal Aquarium Fish Tank Filter

Penn-Plax Standard Airline Tubing for Aquariums – Clear and Flexible – Resist...

Penn-Plax Cascade 80 Aquarium Power Filter Up To 10 Gallon Hang On, New

Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish...

Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25...

Cascade 300 Filter Replacement Bio-Sponge (1 Sponge) – Provides Filtration fo...

11 - Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New

LM Penn Plax Cascade Submersible Heat Aquarium Heater 100 Watts - 8" NEW Heater

REP71 Penn Plax Reptology 70 In-Tank Filter Pack of 2 Replacement Sponges

2 Penn-Plax Cascade 300 Internal Filter Bio Sponge Replacement Part# CIF1FI

Two way Outlet Air Control Gang Valve/Non Return for Aquarium Fish Tank Air Pum

Standard Airline Tubing for Aquariums Clear & Flexible Resists Kinking 25ft

2 Penn-Plax Replacement Bio-Sponge Fits Cascade 300 Internal Filter CIF1 New!

Penn-Plax Lok-Tite Plastic 4-Valve for Aquarium Pumps

Oxygen Air Line Pump Hose Aquarium Accessories Airline Tubing Fish Tank 25-Feet

Penn Plax Cascade 400 Submersible Aquarium Filter Cleans Up to 20 Gallon Fish...

Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” X 11.1” Pl

Best Selling

Penn-Plax Penn Plax Cascade 300 Internal Bio Sponge Filter

Cascade 20 Mini Power Filter 20gph up to 7gal CPF6

The Small World Replacement Filter Cartridge 2 Pack

Pen Plax Tdlbx Large Tank Divider for Aquariums 11 3 8" X

Penn-Plax Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14”

Penn Plax Fish Aquarium 20h Gallon Tank Divider X-large

AQUA-LIFE NANO GRAVEL VAC GVS1 MICRO CLEAN SMALL TANKS