I have a 700 gallon pond with 7 goldfish. My Water Lillie's are doing great but my hyacinth are not. They are yellowing and seem to be shrinking. I have tried placing them in a bucket of water/miracle grow and they started splitting into sister plants but have all turned yellow and reduced in size. They also seem to be browning and dying as well. My ph is 7.5. Water temp around 68F.
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