Fish tank to snake enclosure?

[Sorraia]

We have an 80 gallon fish tank I've been thinking would make a great snake enclosure, but my husband has been resistant. Well today we discovered a leak, looks like I might get my wish after all!!!

Is there anything I need to worry about as far as converting it to snakes?
For example, any diseases that may be a concern?

I plan to clean it out real good using vinegar and hydrogen peroxide, and rinse well. I don't want to use bleach, in case it leaves any residue that may be harmful to the snakes. Do I need to worry about anything else?