multiple symptoms, first time grower please help!!

My plants are 7 weeks old and are in a ebb n flow system (home built)

• Use grow micro bloom from advanced nutrients and H202.
• Water them 3 times a day for 15 minutes
• Using flourecent T 5's 18 hours a day.

Tempature: 75
Humidity:45%
Water temp: 70

I have attached pictures of a few different plants it looks like some have different symptoms, please help me out!

Ill take a stab. 1 looks like the start of a mg D. Maybe you use tap water, I know my old tap water had way too much cal in it and that can cause it. 2 makes it look more like a k D. 3 n 4 look like iron maybe but my new growth always looks like that once n a while and just fixes itself when i water the next time. 5 looks like just something ferty splashed it. I get those sometimes never spreads. sorry gotta run now but I didn't want to leave you hanging and make RIU look bad. U should get a second opinion and remedies bc I havn't dealt with any Ds myself besides mg. Welcome to RIU!

What are your readings for pH and ppm? cn

#3 and#4 have it. and ill raise you a, how much nutes are going in, do you add on or flush, clean, and introduce. id say water 4-5x, change solution and nutes every 4-7 days. dont use h2o2 all the time thats just for clean outs and/or disease prevention. water temp is a little high, bring it too around 70.

Looks like he's not coming back. I hope he fixed his problem.

If I had to guess I'd say it was some kind of pH lockout, and dropping the H2O2 would probably help a lot. But we don't have anything near enough information to actually diagnose it.

Not sure about the rest but picture 6 looks like a PH problem to me.

Yeah old thread but am I the only one that thinks 3x a day for 15min in hydroton is WAY not enough watering?

Good eye! cn