Turtles are great pets to have if you can devote a lot of time to them. I have 2 Red Ear Sliders now.
The musk turtles...the reason why you probably can't find corrent info on them is because there are so many varieties of them, and I think they are probably all misidentified. Only a few of them stay small enough to keep in a 29 gallon, IMO
Have you considered the Reeves turtle? They will max our at around 5-6 inches. One can definitley be kept in a 29 gallon...2 might be pushing it as they become older. They NEED clean water and proper broad spectrum UV
(both UVA and UVB) and are susceptible to shell rot if not provided with it and a completely dry place to bask and dry out.
I have no experience with the Reeves, so if any of this info is wrong, someone feel free to correct me.
RES are more hardy...but will outgrow a 29 gallon in about 2 years, get about a foot wide, and live for about 30 years.
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