Hardware for base and canopy

[BuckeyeBen]

I have had a tank for a while but I have neglected it forever.
I'm trying to get everything going again but I'm having some significant issues.
I built the tank into a wall in my basement.
All of my hardware including the electrical is horribly corroded. To the point where it is unsafe and nearly impossible to even get a screw out.
Any suggestions?
Btw... This goes against physics! How is salt evaporating with the water.
I planned on using the evaporation of saltwater to still it if I ever got stranded on an island

 

[BMW540]

You could use a drill bit to knock the heads off of the screws and replace them. The salt isn't evaporating, it comes from splashes/any mist from the tank.