2nd grow

End of week two and I decided to transplant my plants into 9l pots. Plants look healthy to me, but I am not really hapy with size/growth. Since my night temperature drops to almost 16° Celsius (30°F), I had to do something. In my first grow I had underfloor heating and I figured, that I could try and construct something similar. So I gathered some pvc tubing, an aquarium heater, a mini waterpump and this is what I came up with. Most probably I will add a thin layer of lava rocks which are supposed to store heat. I know it's super ghetto, but it's worth a try...😅