So obviously when setting up a new tank you have a lot of contact with the water moving rock around and such. Sometimes I've been guilty of it not washing my hands to get the lotion or hand sanitizer I used earlier in the day off. I've had many freshwater tanks before and have one running now and they are very healthy and happy. My question is in a saltwater tank how detrimental is this. Obviously from now on I won't have my hands in there nearly as much and can wash them well enough and take the time before having to make contact with the water. But what happens to all that stuff that's already in there. Obviously it's a very small amount if any at all. I do have a 125 gallon tank. But where does this stuff go over the course of the tank? Does the protein skimmer take it out? Just a thought. Because even the oils from my hand have to be in there. My hands always come out dried out as hell. Just food for thought because I know we are all guilty of it from time to time.