I just got a truvu 55L for cheap and it's filled about 98% of water and the front and back are bowing. I put a straight edge against it and measured the ends and it's bowing out 5/8"! I read online that 1/2" should be ok but it's an 1/8" over. The top had a crack on the left rear between the heater hole and opening but it still look sturdy. The top also looks a lil dipped in from the bowing. Should I be worried? It's been filled for a couple days now with no leaks and the seams look ok.