Does anyone use Korallen-Zucht Additives or Supplements? If so, what results have you seen? Just reading the information on their products it would seem beneficial to be using them. That's what advertising is for. LOL I was mainly looking at products that replace vitamins/minerals etc. we lose due to using protein skimmers. Do you think water changes biweekly using Reef Crystals keeps up with what we lose thru the protein skimmers?