Years ago we had what we thought was a thriving group of 42 koi, goldies and fantails. Suddenly, a nasty appearing infection spread like wildfire throughout our beloved swimming pets. After consulting professional experts we had to euthanize all of our fish. The most probable cause of the contagious infestion was caused by fish scraping themselves on the sharp edge man made light weight gray stone manufactured using ground repurposed ground lava stone. These gary stones cause paper cut like injuries that become easily infected. Not being any sort of authority on fish I can only pass along what I was told. Knowing first hand these stones cause scraps and cuts we never replaced those fish. While very realistic, I sincerely advise others not to use these decorative stones in a stocked ponds.
The man made light weight gray stones were sold for a limited time by Lowes. I do no know if they are any longer available from any source. IMAGE SIX showing these stones is located at following web page: https://www.gardenpondforum.com/topic/10387-cypress-point-pond-desoto-texas/
The man made light weight gray stones were sold for a limited time by Lowes. I do no know if they are any longer available from any source. IMAGE SIX showing these stones is located at following web page: https://www.gardenpondforum.com/topic/10387-cypress-point-pond-desoto-texas/