Deficiency? Light burn? Help please?

I am currently on week 5 from sprout, and my plant is starting to show some bad signs. I’m growing in SoHum living soil, and have been in this pot (7 gallon) with this soil for 2 weeks.

The soil dried out very quickly so I watered from the bottom and let the plant suck the water up to retain the water better. I water with 6.4 PH’d water, and use Recharge once a week.

im starting to get what looks like a calcium deficiency (brown/bronze spots) on a couple of lower leaves. Although, it isn’t popping up on different leaves, the ones that have already shown signs are getting worse.

within the past couple days, the leaf tips at the top of the canopy Have started to lighten in color, almost like a nutrient burn, but I don’t think that’s the case as I haven’t added anything. Any and all info is appreciated guys. Would really like to grow this plant out all the way. TIA
 

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