Recently built a 25x25 pond in my yard. Started as a 3x5 but I got carried away on the tractor. Living in N. central Florida stocking with plants is easy. I find them everywhere. Many of them are considered invasive so no issues taking them from public waters.\n\nI have some nice floating "mats' of water hyacinth and a coupe of what I believe are rush in pots.\n\nJust came home from the Ocala National Forest with a plastic bag full of hydrilla.\n\nEverything I read says it is extremely invasive and very difficult to eradicate. A couple of threads I have read speak of it taking over larger ponds (2 acres and larger).\n\nMy question is as follows is it OK to let this loose in my app. 7,000 gallon pond? I would think if it gets too invasive I could easily rake some of it out as my pond is not immense. I see the difficulty in a 2 acre or larger pond but in a 2x25 can I control it?\n\nI would think it would be a good oxygenator.\n\nLastly, I currently have about 100 goldfish amongst the hyacinth and rush. Nice oxygenator stone as well\n [URL]https://www.amazon.com/gp/product/B007BK76YK/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1[/URL] \n\nPond is crystal clear and I think iI have a nice cycle going. I am considering 2-3 koi and wonder if they prefer hydrilla over my water hyacinth? I have read on this forum that if one feeds the koi they may not bother plants. Yea or nay on the koi??\n\nAny help is appreciated.