I currently raise Viviparus malleatus, which I think is a great snail pet in my cold water tank. However, I am curious if there are other Viviparus currently circulating in the aquarium/pond hobby that can get a bit bigger? If I am not mistaken(hopefully someone with knowledge on the subject can step in) Viviparus Japonicus is the longest viv available, while Viviparus chinensis is a bit smaller but a bit thicker through the base.
Does anyone know if larger trapdoor snails are available, and if so, where they can be obtained?
Thanks in advance,