My Purple Erkle ladies are dying! PLEASE HELP!

Need some help before my Purple Erkle ladies die. I haven't noticed any growth with these 3 clones for about 3 weeks. I'm afraid they are too far gone to recover. If, anyone knows a way to bring them back to life let me know.

Purple Erkle #1
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Purple Erkle #2
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Purple Erkle #3
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Please help me save em!