Replacing bottom glass

[Demonknight]

Have been offered a 75 gallon tank for free, however the bottom glass is cracked.
Can one just add a second pane and silicon it in, or do you need to remove the old first?... If I need to remove can someone tell me what all this double pane stuff I've seen is? cause up to now I figured it was a cheaper way of building a tank

 

[Demonknight]

Hmmm, no ideas or comments yet huh..ok, how about I remove the bottom piece and use sealed plywood instead?..sort of a half plywood build? pluses to this would be ease of drilling for under tank plumbing...custom hard scape ect...course I haven't heard back for the gal either so who knows

 

[54seaweed]

this is the closest to your question

http://www.aquariumadvice.com/forums/f11/just-broke-my-75-g-tank-glass-262959.html

never had this problem so sorry not much help other than point you in the right direction

 

[jwh0818]

Its possible to replace but, do you trust your DIY skills? If so then look at buying acrylic for the bottom

http://www.eplastics.com/Plastic?search=ACRYCLR0.250

Oh and btw, that bottom frame is extremely hard to remove without breaking

 

[Demonknight]

well its been two days since I last heard from her so who knows...seems I would be best off getting it and reusing the glass in a plywood tank.