gdc7688 wrote:I intend to add 2 shovelnose catfish to my collection after the bakki shower is installed.
I wouldn't say this is a good idea. These guys are far more predatory than RTCs. They will, sooner or later, eat or attempt to eat your koi, especially the smallest ones - and the stress of being hunted sickens and eventually kills fish. My 60-80 cm TL TSNs hunted and killed plenty of fish even of comparable length but slimer, e.g., 1.5' Jardini arowana, 1.2' bullheads, 1.5' channel cats, 2' silver arowana, etc.. None others did, not 2'-3' RTCs, not 2'-3' RTCxTSN hybrids, not 3' channel cats, not 2' Leiarius marmoratus and pictus, only TSNs appear definitely the most predatory. All of these and 40 other big fish lived in a 40' x 6' x 3' indoor pond.
another case in point, less vivid but typical: viewtopic.php?f=7&t=33408