How to Install an Undergravel Filter (UGF)

Advanced 30 min 16 steps 4363 views Rating: 4.9/5 Published: 2026-03-10

Select a filter that's designed for the volume of water your tank holds.. Empty the aquarium if it's already filled with water.. Clean the aquarium before installing the filter.

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Steps

1

Select a filter that's designed for the volume of water your tank holds.

Step 1

Select a filter that's designed for the volume of water your tank holds.

2

Empty the aquarium if it's already filled with water.

Step 2

Empty the aquarium if it's already filled with water.

3

Clean the aquarium before installing the filter.

Step 3

Clean the aquarium before installing the filter.

4

Soak the aquarium bubbler and rinse the tubing to ensure they're clean.

Step 4

Soak the aquarium bubbler and rinse the tubing to ensure they're clean.

5

Connect the hard, clear, plastic tube that will house the bubbler.

Step 5

Connect the hard, clear, plastic tube that will house the bubbler.

6

Connect the rinsed end of the flexible airline tubing to the bubbler.

Step 6

Connect the rinsed end of the flexible airline tubing to the bubbler.

7

Place the bubbler in the housing tube.

Step 7

Place the bubbler in the housing tube.

8

Connect the free end of the flexible airline tubing to the air pump.

Step 8

Connect the free end of the flexible airline tubing to the air pump.

9

Place the baseplate on the bottom of the empty aquarium.

Step 9

Place the baseplate on the bottom of the empty aquarium.

10

Pour the gravel on top of the baseplate.

Step 10

Pour the gravel on top of the baseplate.

11

Situate the aquarium and add decor inside the tank.

Step 11

Situate the aquarium and add decor inside the tank.

12

Fill the aquarium with fresh, clean, dechlorinated water.

Step 12

Fill the aquarium with fresh, clean, dechlorinated water.

13

Plug in the air pump to the wall outlet.

Step 13

Plug in the air pump to the wall outlet.

14

Add your fish back into the filtered fish tank.

Step 14

Add your fish back into the filtered fish tank.

15

Change 1/4 of the water in the tank weekly to keep the UGF working.

Step 15

Change 1/4 of the water in the tank weekly to keep the UGF working.

16

Siphon grime off of the gravel every time you change the water.

Step 16

Siphon grime off of the gravel every time you change the water.

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