Watering with S/H?

[Jkelee]

Hello, I am new to s/h stuff. I bought a box of Prime Agra. I soaked it, and followed the rules.

But I read on Firstrays, that you water about 1-2 weeks or so. But, I'm confused on this.
I thought you didn't want the reservoir to dry out? Is that true?
As mine dries out FAST, every couple of days or so.

When it is the correct time to water with s/h?
When the reservoir is completely DRY?
Or before it gets dry?

thanks!