How do you fill in a plastic hole basketball hoop?

Hi. I bought a Basketball Hoop with a plastic base in which water is pumped in for a pool. While moving the unit around, i noticed a hole less than a penny's size big, on the underbelly of the unit, on the water tank.



What should i do to fill this hole in?

Is it even possible to fill this hole in?



Whatever it is, it needs to be waterproof, and able to sustain the NJ summer.



Thank you.How do you fill in a plastic hole basketball hoop?
I'd try a pool patch kit, I'm not sure if it will hold, but it's worth a try. A tire patch may even work depending on the type of plastic.How do you fill in a plastic hole basketball hoop?
duct tape

use sand insted of water

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