I always thought the general rule right from the start was 1.5 lbs per gallon of volume .This is rediculous. You claim your way is the way but can't answer a simple question as to why 4 lbs in 4 gallons is not enough nor can you tell me how much should be there. I can't learn if your response is satire. I've never claimed to know the process nor acted like you were wrong. I am genuinely asking for perspective on your point of view.
but that was years ago when Berlin method was a thing .
extra rocks , flow and a good skimmer .
Recent years I believed it was found that 1lb per gallon was good and didn’t take from swimming volume .