@GardenOfHerbs, by the way, because of the way plants absorb calcium, if you have too many ions in the medium it will interrupt. if there's a calcium problem it might be worth to flush the medium and add some calcium alone. the benefit of epsom salt is that you can also use it in foliar form (spray on the leaves), so if you need to add both you can put the calcium in the medium, and epsom on leaves, :)
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