Anyone have any luck temporarily keeping cats over 20" in show tanks used for koi?: "pearls of paradise" says it will hold them with no problem. when i inquired about the barbs, they said that many people house rays and have never had an issue. it is made from a mesh vinyl. was thinking of possible doubling up an 8 ft tank? any luck with "fluid art filters" for these monsters. going to keep fish load down. 3 fish over 2- 800 gallon tanks. these fish will be kept at around 75 degrees and i am building an outdoor heated 6000 gallon pond. appreciate any advise