Yes all the damage is on the bottom pane, can get replacement pane for about £100 but that leaves me to repair it, which altho I am more than confident I can do the job and am very experienced with silicon, it's still a heavy and scary prospect.
My fish room is inside my house instead of in a shed or garage, I must be mad I know, but I like being in there and don't feel I should have to leave my house to do so! Lol
Any way if the tank goes would make a nice mess. Was thinking of putting a drain in the centre of the floor just for good measure. Like what you get in a wet room.