As far as supplements go I mainly use this "Mineral-All" stuff made by "Sticky Tongue Farms", it's a supplement designed for insectivorous amphibians & reptiles. It works pretty good with my frogs, Its got calcium, magnesium, zinc and a bunch of other stuff in it (when you read the ingredients you would think you were reading the periodic table). It sells for about 10 or 12 dollars a six ounce bottle and one bottle will last you long time, I have two frogs and I have been using the same bottle since December and I think that bottle still more than half full.