Yea I just paused it at lights off then resumed when lights on , I did have the iPad secured to the tank but think my son moved it a few times , why second vid was a bit shaky . (Need to make a tripod)
I compared the 1st shot to the last shot taken on the 1st vid over 7hrs and I did see some growth from hc . So you should see some (very little) growth over one day , the problem I have is I use the iPad regularly so it was a pain to have it set up all week , I think I may do another with just the hc , over the next couple of days 🙂
Cheers
. You can see the growth well if you set it at the highest frame rate and just keep it playing 🙂