It's like a couple sets of leaves or a couple weeks yes. then 1/4 to 1/2 nutes. You got it.

I have seen the suretogrow and want to try it. On the drip lines they are better with no drip emmiter just an open 1/4 inch line. Keep an eye on them to make sure they don't clog. When the pump is on just look to see if water is running down the netpot. And if things slow down growing look for that.
Your system will do better if you only run the drip for like the first month just to get the roots to the rez water and then they can take over.

Way to go building your own. Most of us have to see a system up close and hands on and then go home and improve on it.

I have not tried the purple urkle yet but had some papaya that went purple and everyone loved it. Good Luck.