What is the water level at in the rez compared to the bottom of plants basket? Droopiness is usually a sign of dehydration. If your plants roots haven't dropped into the res then make sure that the water level is just under your basket or up to 1 inch higher than the bottom of the basket. On that note the problem could be the amount of air bubbles in your res, you want a vigorous roll that covers at least have of the surface of your res. If there is not enough air in your res solution your plants are basically drowning. Also have you noticed any differences in the leaf as far as coloring?

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