i set up my tank and filled it with water just to realise it’s not level but it is the floor as i checked that too it’s not a great deal the water is just half a cm lower at the back than it is at the front i’ve added a picture of the level with a spirit level and wondering if i should empty some water and shim the front to prevent against cracks, is it likely that it will break or no? also a added a picture of the water difference that you can see by eye the front is perfectly level it’s just the width that isn’t just don’t wanna risk water going everywhere