Just to clarify one point...while its one thing to compare "Greg Watson" type dry chemicals to premixed brands like Seachem and Kent Botanica its adding an apple to the oranges when you throw in the PMDD. PMDD (Poor Man's Dosing Drops) is better thought of as the recipe, if you will, not the ingredients. Many people use the dry chemicals with other methods such as the "Estimative Index" and also the PPS (Perpetual Preservation System).
Advantages of the dry chemicals include cost (you can buy a lifetime supply of most dry chemicals for the LFS price of a few large premix bottles) and the ablility to know exactly what you are adding to your tank and in what concentration.
Advantages of the dry chemicals include cost (you can buy a lifetime supply of most dry chemicals for the LFS price of a few large premix bottles) and the ablility to know exactly what you are adding to your tank and in what concentration.
