Setup looks sick man, I'm growing g zkitz too, maybe just over a week ahead perhaps, I'm set to put mine into grow bags tomorrow I think :)
Be careful with space heaters man, if it's space heaters as I know them, they burn out so easily, not the safest,
Oil heaters are nice, if you worry about heat when lights off,
you could set an oil heater on the opposite time cycle to your light, when lights off, heaters on kinda thing, put it behind or in front of your fan to blow the warm air about
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