I have a well in my basement and it used with an above ground pump that feeds the water into a steel tank about 4 feet tall and 18 inches in diameter. The past week my water pressure has been real low, the water is not what it was. I tried to add some air to the tank using a air compressor, currenty the tank has 30psi in it.When I flush the toilet I can't hardly get any water form any other faucet. I'm not sure what the problem is,, I miss taking showers there the water actually sprays out of the shower head instead of drips. I'm fairly knowledgeable if the system, I have had to empty the take before, primed the pump and presuraized the tank before do I have to do this again? I'm not sure why this is happening, we are not in a drought this spring.