Cold overnight temps (16-17°C) are definitely slowing things down, might look at a heater this week. Some early signs of chlorosis in a couple that could be from pH as the tap water was harder than I thought. Light set at 50%, 330-400ppfd
Gave a good feeding of 5.1.1 fish juice that had a low pH and they seemed to like it so we'll see the effects this week. Stems are sturdy and will respond well to LST. Planning to top a couple (if they ever get big enough) and keep one of the runts in the tiny pots for funsies.