Cut PVC tube to the desired size and into as many pieces as you would like.
Tie up Your PVC tubes any way that you would want them to stay.
Then Silicone them together and wait for them to dry.
Then cut off the string that you used to tie them together.
Then little by little (so the silicone does not dry) smear some silicone on the PVC tubes and pour the gravel on the wet area of the PVC and press firmly.
Keep repeating until the whole PVC is covered or until you are content with it.
Let it dry for at least 24 hours rinse off and place in tank. □
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