tank problems

Hi there, I recently picked up this triangular prism shaped tank off Facebook marketplace, it came with this light. I wanted to see if any of you knew which light this was as some of the LEDs keep flickering which can be quite frustrating and I’m sure it causes a bit of stress for the fighting...

Ive had a 20 gallon 90cmx30cmx30cm glass tank. my 60x30 stand can hold up to up to double my 20gallon weight. ive no problem with the weight BUT it overhangs by 15cm(6inches) on each side. I’m planning on a 25cm thickness of plywood to support the base of the tank. A very thick one indeed. Any...