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I used to keep some of these in ponds (Koi love the roots, so most where in my waterfall area), however if you are running trickle tower or shower type filtration the nitrite/nitrate will be to low for the hyacinths to survive. I used to rotate the plants every couple days after there was a TT on one pond but not my other small goldfish pond but after I put a TT on that pond I was out of luck. After that, I setup a mortor tray with miricle grow and used it to rotate the hycinths inside and out of the pond. To much work so I didn't bother this year. Late in the season they die off so fast its easier to remove them then to constantly pick through the dying leaves.
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