Biggest problem I see is that the water tank is sitting on bricks. A gallon of water weighs 8.35 lbs and all the weight is sitting on the sharp edges of the bricks. If it was my tank I would empty it, pick up the tank, repair the holes punched into the roof membrane and then put the tank on a solid surface of what ever material you have available that won't decay. Make the base bigger to distribute the weight in a larger area. Bricks were a bad idea. Thats a lot of weight sitting on the bricks. How many gallon tank is it?