In something like
Fox farm you only want to water until you see some runoff but you don't want something like 10-20% just enough to know the pot is completely watered. These are organics nutrients and if you water to runoff you are washing the nutrients out of the soil. Which is what we do when using inorganic salt fertilizers and why we do it. Organic nutrients need to be treated differently or you end up washing out your nutrients sooner than otherwise.
To me it looks like the nutrients are depleted and you need to start feeding. The burnt tips can be from excess calcium or the beginning of a potassium deficiency.
Now that the nutrients are depleted and your using inorganic you will want to water to runoff. The
maxibloom and cal mag create a ratio very low in nitrogen. I suggest a feed with 50/50
maxibloom/maxigrow. For the next couple feeds then 75/25 bloom/grow.
You have a nitrogen deficiency