I have two questions. I have read the article, "HOW TO TREAT SICK AQUARIUM FISHE, (EVEN IF YOU'RE NOT SURE WHAT'S WRONG". 1) Am I understanding it correctly to say, that I only dose three medications at the same time, one time, and let it sit the week? Not every day, or every other day, as per the instructions on the container? 2) Can I drain my 55 gallon with, 8 dwarf rainbow, 1 betta, 2 siamese algae eaters, 1 hillstream loach, 6 albino corys, 10 mollys with ?fry, planted, to 30 gallon (to use less medication).