To your left, you will see many Sub-Categories of protein skimmers. We feel a protein skimmer is one of the best investments of equipment you can buy for your tank. We carry high-end high quality skimmers and less expensive lower end skimmers as well. We recommend you buy the best skimmer you can afford, but knowing that everyone does have a budget, we offer less expensive alteratives. Please feel free to email or call for recommendations on skimmers. We are happy to recommend not only the high end choice but the lower end choice as well.