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Hi everyone, hope your all having a great weekend, now to my prob, this is my first grow in a 5x5x7 tent, i used a normal 10x10 room up till now. Anyways, i noticed a some plants have white tips,i have seen this before, just not on my plants lol i am assuming its due to heat build up in my tent, average temp when lights are on is about 28c. though a friend also said it could be nute leeching which apparently happens when your plants use up most of the nutes in the water it then uses whats in the plant and can cause white tips....but i'm leaning more toward heat...the lights are 10in above the canopy, 2x400w HPS, they are not air cooled at the moment, that upgrade comes after this batch is done. anyways take a look at the image and let me know what you think, the plants look very healthy though apart from the white tips....