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my water temperature is from 17-19 celcius, air temperature is 20 during night, 25-28 during day period. i have co2 tabs which should contain calcium, which i add once per week. will try to find some epsom salt. its i dont have much nutrients. till now i always used hesi mix as they prescribe...

Hello, in two days my plants have gone from good to really bad ... i hope somebody here with more experience can help me out with good advice. first my growroom description: - dwc, single tank, 100l, - 6 plants, - two water pumps to mix the watter, one big airpump with two big airstones to...