The Rainwater Tank

I have installed of a 2500 gallon rainwater storage tank on the shop. I built a pad by digging out a hole and placing compacted gravel in that space. I put in a layer of 3/4 inch pressure treated plywood on top of the gravel. This is what the tank will sit on. I connected the tank to the shop downspout with 4 inch ABS pipe. There is a first water reservoir and an overflow that connects to the old pipe that goes out into the yard. It has been raining and it seems to work. Some of the tools used in this p