Good to see them going @Colanoscopy The temperature seems like it was the problem! Good luck they grew out Fast!
About the pH @Albannach. I also measure outake water pH everytime I water my plants and it is now the second Time I experience a certain thing. My Last grow did the same. My pH in Coco is always the same through out the whole grow. Since I First transfere them in to the Coco medium the roots got pH the same like intake water 5,8 to 6,0. but around week 5 in flower my pH starts to drop down. For example Yesterday. I water with my regular solution pH 5,9-6,0 Ec 1800 and my outake water came out at 5,4. Last week it was 5,5-5,6. And the outake Ec is also changing. It raises....when I water the plants I always water them with 5l of water each and my outake Ec was the same as intake. But around week five the Ec starts to raise and is 2,3 every Time I water. So I always flush them more to clean the roots.
They dont show any Kind of deficiency what so ever and girw absolutly Fine. Just curious...
Have you experienced this phenomena? That your Root environment changes through out tHe cycle especilay after week 5? Lower pH and bigger Ec?