I keep them in my basement, nice and cool even in the summertime, max. 22 celcius. Just at basic ebb/flow setup, which is on a timer and waters for an hour in the morning and again in the evening. The reservoir is RO water or rainwater, cal/mag and a tiny amount af Rainmix or occasionally a bit af calcium nitrate mixed with some seaweed extract. In the summer it's max 50 tds, but in the winter I go quite low in water ppm. Sometimes the RO water is mixed with only calcium and magnesium and the tds is around 30. The water reservoir is renewed about every 2 weeks. I use limestone gravel and chickenfeed calcium. Rockwool, medium chunks of bark, charcoal, calcium rock and mixed in a tiny pinch of fish-blood-and bone fertilizer. The only time I water with pure RO water, is when I flush the pot-once a week, Not to forget circulation such as fans running 24/7. Just realized why I made the ebb and flow system.....it was quite time consuming to handle every day

Happy growing!!