I have two 55 gal and a 75 gal all done that way with the lock tite and they seem to be holding great. Just remember if you do it this way that you will need to put a piece of scrape wood on the bottom in the back other wise the tank sits at an angle and all of the substrate gets shoved to the back by your snake. Also I used "I" hooks and fishing line to hold the wood frame tight while the locktite cured over night. I tried it a long time ago with liquid nails and it didnt seem to hold up to well. Im fairly confident that the locktite is holding much better. Make sure that it is the construction adhesive type. its a medium grey color when you apply it. I believe it says in the listing of uses that its good for mirrors and glass which is what made me try it. I have actually picked up one of the 55's by the wood frame to move it after using the locktite. I just picked up a 150 gal tall that i'm considering doing the same thing with. I'll try to remember to post it in the DIY threads if i do. Good luck!
Wow that stuff seems pretty sturdy! I might have to invest in some. The liquid nails is crap lol. How long ago were the tanks built? I'm curious on the longevity of locktite.