<span class="link_user">@Culinarychemist</span>,
To be honest i was lucky with the temperature also, there was some very cold night where the temp dropped to about 22-23 degrees when flowering started which could help a lot. I have an other strain which also showed purple pheno in the same box.
But i did nothing different then most of the times
<span class="link_user">@BudsLover</span>, i started my first coco grow at 5.8 but kept getting calcium def.. Then I read calcium is better absorbed at 6.2.. So I've been keeping mine at 6.2 or 6.3 since.. No issues.. Anyways.. Keep up the good work growmie!!