Hello all, i bought the dr tims waste away to see if i can finally clear all the white slime on the tank that apparently doesn't wanna go away. My question is the instructions are a bit confusing and don't want to make a mistake, it says start with half a dose and already did and it says slowly waiting a minimum of 48hrs between dosings, build up to the maximun dosage over a week or two. Ok but if i keep reading at the end it says use once per week, that confuses me, anyone can chime in that has use this product before, i dont want to harm amything in my tank. Thanks