deficiency? toxicity? dont know what to do

Hi guys. This is my second grow. Forgive my english.

Im a bit confused. This also happened to me in my first grow. Plants star to yellow rapidly and get brown/yellow kind of color spots on leaves. I also have a clawing in the leaves and yellow tips on new growth.

So did I cause a cal/mag lockout by overfeeding nitrogen? Can someone help me here? I don't exactly know what to do.

Details:

Biobizz all mix soil
I don't measure ph as I was told you don't need to in organic. I use all the biobizz nutes. Only water when pot feels light. I use bat guano too.

Pics

(it has gotten worse today so I'm a bit scared)

Flush it.

Clawing usually means magnesium and the rusted spots are usually Calcium. Often calcium and mag deficiencies can be caused from alkaline PH. But your pics don't really show any lime-ing in the top leaves, but the bottom leaves look like they are lacking nitrogen. Flush it, but flush it with 1mL of cal-mag per L of water. Use RO or Distilled to flush. Give it a few days and start feeding it again with a 1/4 feed schedule or 350ppm then work your way back up to 1/2 strength or 650 ppm. Be careful with using pre-mixed slow release nutrient soils. They have unknown amounts of nutes and that will make it difficult for you to know whats going in.