I just ordered and got some dry fertilizer and am a bit confused and dont want to fertilize my tank untill I know what im doing and its safe. I ordered Plantex CSM+B, Potassium Nitrate, Potassium Sulfate(do I even need this...i just did some more reading and people say you dont need it?) and Mono Potassium Phosphate from Green Leaf Aquarium. I have a 55gal tank and Yet Another Nutrient Calculator says to dry dose 1.594 g Plantex CSM+B, 2.546 g KNO3, 3.48 g K2SO4, and 387 mg KH2PO4 2-4 times a week. I plan on dosing 3 times per week. What I need help with is first do you just use a scale weigh it out and dump the amount strait in the tank? Secondly do i even need Potassium Sulfate and do I need any other nutrients for the tank? My water is fairly/very hard so I do not believe I need a GH booster. Thanks for the help.