Your typical cycling air compressor has oil in it that will be introduced into the pond and/or clog up the diffuser. It will also be too noisy and expensive to run. You need a continuous duty compressor made for pushing a set volumn(cfm) of air at a given presure(psi) Requirements depend on the depth of aerator. Each 2 1/2 feet of depth equal 1 psi for the compressor to overcome.
