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Those pics were from yesterday. I watered them last night with plain old water, how long should i expect the plant to be getting worse? it didn't get WORSE really, just more leaves turned brown today...
be carefull of too much water too, you could get your soil waterlogged, the roots will die off, and especially calcium will become a problem first, as the place where the plant uptakes calcium is just behind the growing tip.
but it does look a like nute burn, - if you flush, rather flush with a very weak nutrient solution - it works better at flushing out excessive nutrients than plain water.
After you have flushed - leave them
Just remember, as the flowers mature, one usually gets an overall deterioration of the foliage.