Sharon Posted July 15, 2020 Share Posted July 15, 2020 I live in Texas where summers are HOT. I've always kept goldfish in my horse tanks to eat mosquitos. I've also kept Koi in horse tanks, and still do. They thrive. I thought I'd pass along a tip. When I use metal tanks, all is well. The black plastic ones will cook your fish, though in this kind of heat. This year I have started an outside tank with white cloud mountain minnows. So far they are doing well in spite of a couple 102 degree days. They are on a shaded concrete patio. Not sure what will happen if we get some of those 110 degree days. I have air stones in their water. The koi have a DIY. pond pump/filter similar to the one Cory showed how to build in a video. Thanks Cory. My koi are 20 years old as are some of the goldfish. 5 Link to comment Share on other sites More sharing options...
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