Need to dose items like calcium, magnesium, or some other chemical that’s vital to coral growth and aquarium stability but hat shelling out big bucks for liquid supplements that don’t last very long? Well, you can buy the powder ingredients for each of the liquid products and make them yourself. A really common one is the homemade calcium supplement, which can be made from pickling lime to get you an inexpensive kalkwasser. If you need to branch out from homemade kalkwasser, powder ingredients for other mixtures can be found all over the web, including some marketed specifically toward reef aquaria. So if you want to be a little adventerous and quit wasting fistfulls of money on bottled supplements, look for balling salts and other powder chemicals to make your own dosing recipes.