Critical orange punch (soil grow)

Sooo my seeds popped 5/5 success rate! I put them in a very low nutrient soil called Atami ATA bi grow mix in 3 or 5l pots with a splash of warm water. I have an eco heater in the tent @120watts plugged into a heat and cool thermostat which keeps levels within 1° of 28°.. I have been watering these just a splash from a drinking cup each.. they are all under one 200w LED currently.