White residue, yellowing and crisping of leaves

This is my first time growing with hydroponics. My plant is two weeks old from when she broke the surface of her growing medium. For the past week I've been watering her with a half strenth nutrient solution containing micro, grow, bloom, and nitrex. All from the Advanced Nutrients brand. Everything was going good until I used a 3% h2o2 from CVS. to rid surface algae on my rockwool. I heard it was good for the plant so I sprayed some on the leaves too. About 5 hrs later I noticed a white residue on the leaves. This morning when I woke up and all the leaves had this white residue and some yellow spoting, also one leaves tip had crisped up. So I freaked out and changed the water which was scheduled to be changed tomorrow. I did not add any nutes this time, I just adjusted the ph with these cheap ph strips that only read 5.0, 6.0, 7.0 and so on. Not to worry though I've already ordered my HI combo ph pen and it should be here tomorrow. Anyway I'm just trying to get some feedback on mistakes I've made if any. Should I snip away the crispy leaf tip, raise the lights, stop spraying the plant. I've added pictures of the issues and light distance. Any helpfull tips and information will be greatly appreciated...

Why would you spray your young plants with H2o2? I think that should only be used for root problems. Bloom nutes are for flowering only. You should be using grow nutes. The white residue is propably dried H2o2. spray them with plain PH'd H2o a few times to wash off the residue. Don't over nute, your plants are too young for full strenth, you should feed them with 100 to 200 ppm.
Here's a nute strength chart I found on line that I use. It seems to work pritty well. You may find a better chart from someone else, but this works for me. Of course this is only a starting point, you may find that you strain can take higher or lower, it's up to you by trial and error.

PPM for Hanna Chart PPM

Seedlings, Early Sprouts 100 to 250
Early Vegging 300 to 400
Full Vegetation 450 to 700
Early Blooming 750 to 950
Full Mature Blooms 1000 to 1600

Thanks for the reply DeeTee...I'm extremely happy to report that my plant is doing really well. After this whole ordeal I've came to the conclusion that spraying the plant with h202 is not a good idea. I'm glad it happened early on because if it was past the fourth week I might have stressed out a hermie... Right now she is sitting in a dwc and loving the nute solution.. I got new leaves at every branch along the stem... Just have to keep hoping for that sinsemilla... I'll be posting pictures soon...

You sprayed them with h2o2..... lol. The shit people think of... Thats like spraying pepper spray on yourself lol.