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A few weeks old. Not sure what going on. I've added cal-mag. Maybe not enough. Looks like calcium deficiency to me.
i use r-o water with 600 watt hps. Anyone else have any ideas?
It definitely looks like a calcium deficiency, if you’re using R.O water, it strips it clean of calcium, and it becomes a nutrient you need to add to the list of nutrients used.
I’m not so familiar with the topic as I haven’t used R.O water or had a calcium deficiency myself yet, but I’ll included a link to GWE calcium deficiency page, and it will answer almost every question you’ll need to get her back to a thriving green state. Hope this helps some
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