If my plants sat in PH 3 for 10 minutes I wouldnt be suprised if they didn't make it. Not only is that real bad, but fluctuations by themselves are bad. Get it to 5.5 or so (debatable) and keep it there. Always.

And holy crap, that sure seems like a lot of ingredients. People can easily get by with 2 nutes: Veg and Bloom. When I first went to hydro that's what I used, and in my humble opinion I achieved some amazing results. I know adding some others can help (and I do add some), but they are not nearly as important as getting the basics right first. Basics such as PH.

Enough of the lecture, this happend too me as well. Like the above suggestions suggest, I immediatly rinsed thouroghly with PH adjusted water, and let them sit in it a couple days, then swithced to 1/8th strength nutes and worked my way up. Everything has a chance of being OK if you do the same.

Hope that helps a little. Everyone remember: Dirt-6.8, Hydro-5.5, at least that's whats seemed to work the best for me.

Almost forgot: PH creeps up through time, enough to worry about it and to check it regularly.