Cocos A & B - Help needed

[GoodGilligan]

Hello -

Does anyone here have experience with Cocos A & B? I can't quite figure out how to read their feeding schedule. I was able to get the first batch mixed up by using the calculator on their website. But they then recommend adding additional nutrients each week. My question is, do I just add these amounts to the existing solution, or do I have to empty the tank and create an entirely new batch of nutrient solution each week?

Thank you
GoodGilligan