Qestion about hydroponic nutrient solution

I was reading this article here https://www.rollitup.org/view.php?pg=...article&id=180 and I don' t fully understand a part of it, English is not my first language.

Here is the part I' m struggling with


"Simply put...
Top off daily with *half strength nutrients, alternating days topping up with plain water. Change the entire reservoir with fresh solution every ten days to two weeks. (*half the strength of your current new reservior starting strength)"


What do they mean by "topping off and topping up daily How do I do that Also struggling with "half strength nutrients and the alternating days topping up with plain water. Anyone who could ex-plane it to me please....

Any help would be greatly appreciated

All they are saying is add plain water one day to fill the reservoir to the fill line, then the next day mix up your nutrients and water at half strength to fill the reservoir.