Blizzin, you write that you're using GH but that is a three-part nute. Are you using the Micro part as well? You probably should be using all three, the veg, micro, and flower ferts together in different strength depending on the cycle. For example, use a little more of the veg fert (green one) for veg growth and less of the flower fert. Use the same concentration of micro throughout the entire grow. It's good that you measure both pH and PPM. This is necessary in hydro, but no so necessary in soil. It looks to me like the spotting you're seeing is probably magnesium deficiency, but it's hard to tell for sure because the spots don't show too well in the photos. If what you're seeing is golden-yellow spotting in between the leaf veins (on the meaty part of the leaf), then it's probably mg deficiency. It isn't enough to just use one bottle of GH nute. The reason why nutes for hydro are seperated into different containers is because the manufacturers want to give the grower the ability to modify how the ferts are used and tailor them to different situations. The other reason is becuause the manufacturers want to get more of your money. But since you're using GH you can get the micro if you don't have it or just throw in a small amount of epsom salts, like half a teaspoon and see if that makes a difference. If I'm right about it being mg def, then you'll see the plants improve in about a day or so. The bummer about epsom salts is you need very little of it but have to get it in a large container typically, at the drug store. I've seen mg def before and that's pretty much what this looks like. The GH micro has magnesium in it, but the micro is the only bottle. One other reason to split the ferts out is to prevent the elements from binding to each other and falling to the bottom of the container. Then they're useless. I'd leave the PPM at 1200 as I think that's a good number for DWC. In fact you might consider raising that to 1400 as the plant looks rather large. It looks fairly good so far, I think you did a good job and you're almost there. If you feel you can clone that thing, go for it. The more, the merrier. I don't know how cutting PPM in half will help as the plant looks good now. You just need to identify the problem and fix it. There's probably pics on this site and on the web of deficiencies. Try googling if you want, but I'm pretty sure it's mg def based on the pics.

When you switch to 12/12, just cut back a little on the veg fert and give more of the flower fert. Keep the micro amount the same. You just shoot for the same PPM number, only higher phosphorus, lower nitrogen. By the way, it's almost impossible to light burn plants with flouro, even if the leaves are wet. Flouro just isn't hot enough.
polishpollack Reviewed by polishpollack on . DWC Plants seem to be becoming sick Ok my plants seem to be beginning to drop and some kind of deficiency. Ok a couple questions if anyone would be so kindly to help. I have a couple dropping leaves toards the bottom of the plant anything I can do about that? Also As you can see in the pictures like 1 or 2 leaves out of all 5 plants have those yellowish orange spots which doesnt make sense why wouldnt other plants show signs? My Setup Fluro 2 55w 6500k lumens DWC 5 gallon reservor fans ciculate plenty of ventilation Rating: 5