So today i picked my 90G tank with 48x18x24 dimensions with 8mm glass now the thing is that i am very worried about the glass thickness as i read on many website that 48x18x20 is okay with 6mm glass so keeping that thing in my mind i made this tank with 8mm,but still as the tank is at my home not started yet questions are in my minds how safe it will be should i fill it with 20inch? or 22inch? height i hope this issue can be solved here waiting for the replies