Yellow/brown spotting

Discussion in 'Sick Plants and Problems' started by AlienJaws, Oct 11, 2010.

  1. First time poster and first time grower so if my post doesn't meet forum protocol I apologize in advance I'm just trying to get some quick help.

    I am growing two plants in a space a little larger than 2'x2' with a 250hps in DWC. Air flow is great as I have a filtered intake fan at the bottom of the space blasting a/c into the grow and the air is being flitered through a carbon filter out through the attic. I am growing two different Pyramid Seeds Tiburon Shark and Magus Genetics Warlock in 5 gal buckets. I have used the lucas formula to mix my nutrient solution and have been very pleased with the outcome. I have been using general hydra flora series nutes.

    I recently discovered a snot like algae problem. I throughorly cleansed the buckets and added a few mL of hydrogen peroxide to the nutrient solution. However this problem seems to be under control or at least at bay.

    My main concern is an ever increasing problem of yellowish brown spotting on what has become quite a few fan leaves. It started with the gradual yellowing of a few leaves and now has spread to a significant portion of the leaves. The affected leaves beginning by gradual spotting and then eventually turn crispy and dry. I have trimmed quite a few of these leaves off to devote energy to healthy portions of the plant. Despite this hiccup both plants have shown significant growth and are a bushy 18". I put the scrog in place and have been letting the grls grow into it training and shaping a lit
    tle at a dam every day. They aren't quite as large as I would like ,but due to a time constraint I will be flowering in a day or so. They look very good overall, but something is not quite right. I have considered pH fluctuations as the root of the problem, but overall the pH has been steady lately in the 5.5-.5.8 range. I am using a cheap drop system tester, it isn't ideal but it's what I have. I will attach a few pictures of some cut off fan leaves with the spotting. I dont have any photos of the entire bush due to th light causing lines to form in the photos so I hope these will suffice.e
     

    Attached Files:

  2. whats the ppm looks to high
     

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