Try blue that would be cool it's only food colour on one plant , try it's whole life wi blue. Lol don't listen to Mr know it all he is a hard work ... things don't get invented unless you try go a head mate like to try myself with a seedling all way even wen feeding few drops blue I. Water along...
Well that's wat I'm hoping my plants do. Right enough if water runs right threw obviously good airation but don't let them sit in a pool of run of too long you will end up with root rot cause the soil will be constantly soaked so little bit ok too much get rid of it and give tent a clean out