Some popped!!

90+ Buds looking like this!!!!

After reading the brochure, I have more questions than answers. What is EC? What is the PPM (700 scale)? And instead of following their formula, cut in half?

Hey guys, with overwatering being a huge issue when growing cannabis, I wanted to see how much everyone waters as I'm concerned I may be giving my plant too much water. I'm in a 5 gallon fabric pot using soil mixed with some coco and perlite. It takes about 6 quarts of water to get around 10-15% runoff, which I only do every 4th of 5th watering since I'm using organic nutes. Most of the time I just give it a gallon with no run off, but I'm wondering if I should give it less, so I can feed more often then every 4-5 days? Thoughts?