chasv77answered grow question 5 years ago P.S. - Not to be condescending, but I use the 2 knuckle approach with my finger. If it is cool, but not damp, I water/feed 1 gallon till it just starts to collect in my drip pan.
Allowing your liquids to slightly overflow, to me, reduces chance of nutrient, salts, etc. buildup in your soil.