It'll dry out according to the amount of roots in the container,and room conditions.Might be a day might be 3.
My advice is let it dry some a few times between your water/feed.As your coco drys roots will search for water and fill out your container.
By dry i'm not meaning completely.Dry enough to where your pot isn't saturated and heavy.TO dry and salts will build up and roots will dry out and suffer.Take notice how heavy the container is when fully watered.Let it loose half of it's weight,maybe even a tiny bit more.If your plants get wilty you know you let it get to dry.If that ever happens NEVER water with normal or heavy feeds,use 1/4 or even less strength.Lock out will more than likely become a problem if you let it get to dry to many times.