First grow and diary

Medium : coco buffered twice mixed with perlite (70/30). I buffered the coco twice with 1 gallon of tap water and 7.5 ml of calmag 8 hours apart. ph of the run off according to the test indicator was showing a yellowish colour which means it was between 6-6.5. After buffering the coco i flushed it with phed water to drain out any excess salts and the tds meter was showing the same 270 ppm as my tap water which im hoping means ive flushed any salts out of it then added my perlite mix. I have my seed germinating in a paper towel between 2 plates. It should show a root by the end of the day. I will be feeding initially with 270 ppm tapwater for the first couple of days then slowly incorporate rhizotonic into the grow to help the root growth in the initial stage. As I have been advised I should add rhizotonic as early as possible but keep it to only 30 ppm.This is my first grow and i might not be filling these journals out the ideal way so any criticism and advice on both the grow and diary entries would be greatly appreciated.