Would this be ok?

[Brent Shaver]

ok seems I wont be using my 50 to do this so I am back to building one. As you all know I am new to this so sorry for the multiple questions.

If I was to build one, since I really want to store/hide it under my 110. What depth do I need to have for sure to make this an effiecient unit? I dont mind making it longer vs higher to maintain the water volume but dont want to build it to only have it not be enough. Everything I have read states it is best to get the most water you can combined so would really like to try to stick to the 50 gallon size if possible.

I know fiberglass will not emit toxins once it is cured so was thinking I would make this out of wood then coat it with fiberglass to give strength and of course to ensure no leaks.

Am I dreaming to think I can accomplish this under my tank?

Thanks for the quick responces.
Brent