I got a new puppy so im massively distracted now. Still disappointing grow from this one, but I wouldn't say she looks massively unhealthy, which is a plus. Ill see what happens in the coming weeks. As she is so small I don't need to filter the cab as theres practically no smell.
They are growing slow as you say...i would suggest you to rise a bit the temp expecialy during night time ( roughly 19°C)...and double check if they are in an under/over watering situation...are you giving them some nutrient feed?
@jackjack, Ok i'll see what I can do with the temperature at night.
I don't believe I'm watering badly but watering and nutrients seem to be an issue for me that I can never get right, so I'm abstaining from nutrients at the moment.