Is anyone culturing there own Rotifers? I am thinking about doing it, looks easy and great benefits from doing so. You have to remove approximately 30 percent of the Rotifers every three days, which if i do a 5 gallon tank would be about a gallon, my question is would a gallon every three days be to much for my 120 gallon tank, how often should the tank be fed? I don't want to overfeed and cause issues.