I talked to the LFS about getting some kind of bulk magnesium product for me instead of the expensive small bottles I have been buying from the store. Well he got something for me, its in a powder form and you mix 1/2 tea spoon for every 20g of tank water. Its called Magnesion - P and the company that makes it is called Brightwell Aquatics. Good or not good, or never heard of it, lol?