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I came home and checked on it then ph was at 6.7 so I lowered it to 5.3 cuz I know in their morning it'll be above 7

I'm giving it 1/4 strength GH flora series nutes and 1/4 strength emerald harvest calmag

My reservoirs ph rises almost 1 whole point within 4-5 hours so I set it like at 5.8. I've read that air pumps make ph rise so I set my pump low but it still didn't work. What can I do ?

I'm feeding GH flora series and I started a week after it sprouted

I have the water level below the cup so that just the roots dangle in the water, I pH'ed the rockwool when I planted the seed and I adjust the reservoirs water daily at around 6.0. I started it on 1/4 strength butes but I upped it to 1/2 strength 3 days ago

I'm running a galaxyhydro 300w led but it's like 2.5 feet away from them top of the plant

Is this a calcium deficiency? The first set of leaves keep getting worse and and there's no new growth like if it's stunted.

Today is week 3 for my seedling and I've noticed the tips are becoming burnt for some reason. My system is dwc and my nutes are general hydroponics flora series at 1/4 strength. My light I'm using is a galaxyhydro 300w LED hung about 3 feet from the seedling. Are they suffering from nute burn or...