I don't know what the deficiency is but heres what I'd do. Flush your plants asap with 3-4 times the volume of the plant pot and then water with a mild (1/3) strength fertilizer... No epsom salts. I think that you have a toxic salt buildup from adding the Epsom salts. You really need to flush them out as they will lock your plant up completley.

The problem could've stemed from using well water. It's hard to tell whats in your well water. I'd switch to tap water and unfiltered. Tap water is really quite good for your plants, gives them a few trace elements like Mg and Ca and doesn't usually need to much altering of ph.

Hope it gets better mate