Northern lights+big bud, berry Ryder and pineapple punch autos

Ok so I have the 3 above mentioned auto planted for about 3 weeks now and just transplanted them into 5 gallon buckets with FFOF soil. I have the fox farm trio pack along with the open sesame, beastie buds and cha Ching the question I have is when should I start using the open sesame with the grow big? The nrh lights is growing its ass of and from what I have read it will be done before the other to. Also how much water should I give them each watering, I was thinking about a gallon each time and watering every 3 days. The grow setup is a 3x3x6 tent with one kessil purple light and 4 led light from lowes for now. One fan blowing all the time and the lights are on a 18 on and 6 off cycle. Thanks in advance for any help.

bump anyone??????????

Ok...first you water until you have some run off from the bottom of bucket that way you know the soil at the bottom is wet. You want this because the soil will dry from the top of bucket to the bottom and this will cause the roots to grow downward expanding the roots. Bigger roots=bigger fruits. With soil you cannot be on a schedule like every 3 days. I water by weight. I pick up the bucket to see if it feels light. Also stick your finger down a few inches to see if it feels damp. Im not familiar with your nutes so i dont want to give you advice on that. Good luck