Identifying problem?

Hey everyone, grow has been going very steadily , im in hydroton in a titan flo and grow, started week 5 yesterday and have noticed darker brown/crispy spots on the leafs...not all of them but some. The rootzones look great but here is a picture!

looks like it might be a phos deficiency. Chances are you just made a mistake when you were mixing your nutes, I suggest just changing the nutriants if its hydro or waiting until next cycle if otherwise, but I could be wrong. http://www.420magazine.com/gallery/data/500/cannabis_leaf-deficiencies.jpg this is a helpful chart to identify this stuff

^^^ What he said, I had this same problem with my last grow, the Phosphorous cleared it right up. Good luck!

awesome! i think i may have added too much cns ripe 17. im using aquaflakes nutrient line but instead of their product bud xl i used cns because i have a gallon of it that needs to be used. theyre not in any danger but i recently noticed the dark patches....so it more than likely an overdose of phosphorus?!?! makes sense

How`s your ph ? Sometimes you can add to much of something and cause a lock out just the same as not adding enough also ph and temperature can cause lock outs too

If it`s a very lower leaf then don`t make any sudden changes just slowly get everything to where you need it to correct the problem as the plant is eating the lower leaf to feed the top I only go into emergency fix it now mode if a whole plant is looking sad or the top is having issues

A bit of orange or yellow on a lower fan leaf is just a way of knowing you don`t have everything dialled in quite right it`s nothing to panic over last thing you want to do is over react and do something that will shock your plant.

I`m guessing your flowering now ? so I`d add a bit less grow and a bit more flowering nutes maybe a tiny bit of cal/mag if you have any I`d give a very light spray feed and maybe add some fulvic acid to my feed as that stuff is simply liquid gold for plants.