N overfert usually shows as a beautiful dark dark green in the plant which I have done personally.....the only other fert probs I had were 1. not using enough Cal Mag which caused some sort of MG def or something.....leaves were green but veins were yellow....stopped right away when I went to 50% Cal Mag with my nutes as suggested by my hydro guy (he told me to use 50 and 50 Cal Mag and nutes until I got to the top of the Cal Mag scale which I really havent' done yet...I use that all the way through flower) and when I went too low on the nutes...caused an iron def or something....the whole plant wilted down in about 24 hrs but came back w/higher nute level. None of these sound like your problem however.

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Weedhound Reviewed by Weedhound on . PH Dropping quickly? I'm sorry to post this question, I tried to search but the term "PH" is too short for the boards search function... I'm having to PH Up my nutes more frequently as my plants grow. I'm wondering if this is considered normal, or if it is indicitive of any actual problems etc. I only use 8 to 10 gallons or so total (going to change it out and measure carefully today) and the plants are only about 10 inches tall, on their 8th node. I calibrated my continuous meter yesterday, and PH Up'd to Rating: 5