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Hi everyone,I have a 3 hp AC unit (28000 BTU).Like everybody here,I want my grow environment to be cooled when lights on(I also got air cool reflectors for 600s) and be cooler when lights are off ! (From wat I've read that the same temperature betwee day n night will cause hermie and stress the...

Hi guys,I built up a grow room so used some white paint on the walls.By that time,I also took a lot of onion to remove the toxic in the air and the bad smell from the WHITE PAINT.But 1 week ago,my father came in and felt very uncomfortable for his eyes,just the same as my gfriend yesterday when...

My rockwool (fire insulation) is slab,not cubes.I use knife cut them into cubes.First,I wash under tap water to let it wet then use salad spinner to let all washing water out ( I found out that if don't do this step,my rw cubes can't absorb the water well !) Secondly,fix PH to 5.0 and 1ml h202...

Very slow grow,just over a heat stressed time,droopy leaves.Please teach me how to fix this.I did it in soil mix perlite.2 ww x bb started(16/02/14) with a 600w hps then 6 days later i moved to under 2 23w white color CFL inside a small cabinet (this place no air venting so this caused heat...

Hi guys,I am a newb to hydro.So my problem is PPM and Ph. My tap water ph 7.2,ppm 200,filtered before use ! My res is 100l,the PPM after mix nutrients is 600 then I correct the ph to 5.8 by h2so4 98% OMG,the PPM is 1100,what wrong to me ? Just make up a batch of water to see,not for growing but...