hey guys i transplanted my plants aout 10 days ago, and some of the leaves turned yellow at the tips, i thought this was due to transplanting shock, but it seems to be getting worse...
Hiya Zechbro
Firstly, it's not transplant shock - leaves don't turn yellow through transplant shock generally. Neither is it temperatures - my plants live very happily between 70-80 degrees, lights on and off - any temperature between those two should be fine, in fact 70-80 are the optimum temperatures for growing inside. Make sure your lights off temperatures don't drop below 60 though as plant growth will stop below that temperature.
Neither do you need to run your fan 24/7, plants don't use co2 at lights off and therefore they do not require a fan operating to circulate the air. Many people choose to run their fans at lights off for the sole reason to keep air re-circulating around the plant canopy and to reduce high humidity, particularly in flowering as the air temperature in the grow chamber will lower at lights off. An air temperature moving from a high to a low will raise relative humidity as the air holds less water at lower temperatures than high and that water evaporates into the air raising humidity levels. If your relative humidity level is not going over 60 at lights off, there's really no need to be running your fan at lights off.
You also don't need a moisture meter to check your plants moisture levels. They're innacurate, cheaply made and unreliable and you'll damage your roots shoving the probe into the soil all the time. Very few if any experienced and advanced growers use moisture meters - learn how to water your plants correctly using the 'wet/dry' watering method and once you've mastered it, you'll never have under or over watering problems again.
Also don't let your water stand at all - this is another 'old wives tale' perpetuated by people who don't know what they're talking about. Chlorine (that's evaporating out of the water by letting it stand) is not at high enough levels to damage your plant - allowing all the dissolved oxygen to vaporise out of the water however can damage your plants.
Also ignore everyone else in this thread 'guessing' what your problem might be - because that's all they're doing - guessing.
Yellowing leaves could be caused by over-watering your plant, it could also be Nitrogen deficiency or one of about half a dozen deficiencies. Post a picture if you want an accurate assessment of what your problem is, because without one all we're doing is guessing.
