Electrolytes

I bought some electrolytes, I can't get LMNT but I bought something similar on iherb. I noticed with both products the amount of potassium is only 3 or 4 % of daily value, per teaspoon (one serving). The bottle says take a couple teaspoons a day, but is that enough? It seems kinda like what's the point for such a small amount.

The product I ordered has more magnesium than LMNT but again, it wasn't that much.

How much of it am I supposed to take?

I was going to add it to my water at work. Should I just down it all at once instead?

Thank you