Below are instructions on how to trouble shoot the light. Apparently majority of the time is a battery issue. The battery was placed upside during production,so the customer would just have to flip the battery with the (+) up.
- There is a box on the clear cord attached to the product, press down on the minus sign (the light should flicker)
- Make sure the battery is placed properly in the remote (+) sign facing up
- Stand in front of the tank, hold the remote close to the lid and press the on and off button a few times back and forth then select a color.