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its calcium nitrate and magnesium nitrate. maxibloom i think has calcium nitrate and some calcium sulfate.

i dont have anything to lose . without trying i won't know :)

calcium 2,2% magnesium 0,7%

you have a point cause my base nutes contains cal-mag . there is a big chance that is a lockout from excess Ca. i will do this on sunday when i change reservoir.

hey guys thx for the answers. I've changed the reservoir on sunday. sunday EC was 3000 μs/cm. Today ( Tuesday) . EC = 2600 μs/cm. Spots seem to not spreading those 2 days. I ll change the reservoir next sunday , and i will lower the EC to 2500μs/cm

so i could maybe low the ec , light power and co2 concentration ?

i have strong light with high co2 plus they are clones and heavy feeders. The 3000 ec is the highest i go with this clone , i know it sounds high but it is just in the beginning of the week . During the week i add just RO water so my ec is coming down everyday. It could possible be nute burn .

Hello. Those girls are same clone in RDWC system. Grow area : 1.5m x 1.5m Temperature : 23-26 celcius Humidity : 55-60% Co2 : 1100 ppm Light : Resina Q bar 700 watt Light distance : 45 cm Nutrients : Advanced nutrients connoisseur full line Current EC : 3000 μs/cm ( i am not going to go higher...