Upward curling of leaves and couple brownish spots

[Mr. Sandman]

Yea this formula was researched before starting so just a trial run. I flush the coco with tap water real well then pretreated with half strength nutes. And right that's why this formula avoided calmag cause it didn't need to be boosted just mg was low so just ran the epsom I think that's this issue my friend had when he used the calmag also spiked his Cal and I believe he said threw his N off but idk what brand he got or anything he researches pretty well before doing anything. But I still like getting other advice better to collect plenty of knowledge and find what works best for you. I just got my irrigation setup so hopefully they will explode with growth here soon :smoking: thanks again for all the advice I'll let you know how they progress using this formula or if I have to alter it at all

 

[Mr. Sandman]

I got these spots on one plant does this look like ca deficit I thought it looked more like phosphorous or potassium thought I would get a second opinion it's only on a single plant out of 6. @Waira