Was the tank level?
Yes, it was level.
Thanks for the input.
I'm just going to throw a few things in here that I gleaned from other pondering.
1)Many manuf. use tempered glass for bottoms. From yours cracking that was not used. Tempered would have shattered into hundreds of squares.
2)Most manuf. "float" the bottom, meaning the sides do not rest on top of the bottom..
3) glass breaks easily under weight and small "deflections" from flat. Many "pad" the bottom to relieve small imperfections in the surface.
So is tempered glass better? Wouldn't it be more catastrophic on failure though?
I do not understand the "float" you mentioned; how are the sides not going to rest on top of bottom?
By "pad" do you mean placing the bottom on top of some soft material? Would a sponge used in sofas work?
Oh and I already read the site today after the failure of the glass bottom and it did give some insight but I still feel lacking wrt to glass thickness I should be using (i.e. is the current one I have enough at 5 mm)?
Must have been quite a mess. Hope you did not lose any livestock.
For attempt #2 suggest to use styrofoam sheets on the tank bottom. Commercial/pet shop tanks have a plastic brace on the bottom to help even the stress loads and lift the bottom plate off so its only resting on its edges on the support.
If you want to go that route then make a rectangular wood frame for the bottom border of the tank say only about 2x2cm (width and thickness) to support the edges of the tank only with no stress or load on the bottom plate on its center.
Thankfully, I was still testing the aquarium for leaks at the time... What I did is add water at a gallons each every day. was on the final day and now this... My Betta fish are so cramped up in their make shift homes now...
I am having trouble finding Styrofoam locally. I am going to have to go to some hardware/furniture stores to see if they got a shipment recently and threw out a bunch. Will definitely add this on the bottom. By plastic brace, do you mean like a plastic frame on the bottom or small plastic legs that lift it off and the aquarium rests on these small legs (like those found under laptops)?
If there is a brace, would foam help or be more of a trouble maker then?
Finally, w.r.t. to making a wooden frame, I am at a loss as to how to best join 2 pieces of wood for this purpose; join by nailing the vertical piece to the horizontal piece (the nail enters horizontally on the vertical piece into the horizontal piece) and the two piece edges lie on the same plane, or the vertical piece lies on top of the horizontal one and you nail vertically?