if it peaks at feeding time im thinking the only thing your removing is tinted water, as protien skimmers die down during feeding time in sw tanks. that and the fact you have a small skimmer on a large setup im shure it looks like your removing alot but in all actuallity the money spent on the skimmer would cost more than a drip system which would provide better water quality 100x over and provide more stable water perams and no water changes.