I use gaia for my plants and i find its best not to runoff water because you want to deplete it of the slow release nutrients. I have found that if i water about a liter or 2 of calmag water (i use ro so i always add calmag). If you are watering with RO always always add calmage that is the only issue i have had using gaia.
My feeding schedule for autoflowers using gaia is
First 3 weeks 70/30 all purpose/power bloom (3 tbs per gallon)
Weeks 3 to 6 top dress 2 tbs per gal 50/50 mix
Weeks 6 to 9 70/30 power bloom to all purpose. Hope that helps.