You need to chose one method that is working. Deicers provide a small opening in the ice to allow the gases to escape from the pond. Most units sold are low wattage and create just a small vent hole in the ice. If the pond is large, multiple units may be used. The bubbler has advantages over the deicer in that it has lower energy usage and does a better job of degassing the pond especially when larger fish are present in the pond. The compressor unit should be off the ground and covered to protect it from the elements and cannot tolerate being submersed. Several deicers and aeration systems are in stock at the store.