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I've had neither calvus nor comp ever attempt to eat an adult shelldweller. Altos seem to be cautious of their delicate jaws.Fogelhund said:Having kept adult and wild large calvus with multifasciatus, for the better part of 15 years on and off... I have yet to see calvus eat ANY adult multifasciatus. Once they get over half an inch, they seem to be completely ignored, at least in my experience. Now they will eat the odd fry, but that has never seemed to stop colony growth for me.h0nkzz said:prov356, not only he will be picking up fry, but adult calvus will snack on them adult multies too
I do agree on getting couple of females for your lone male.
Now keep in mind, calvus aren't open water predators, in the wild they suck small fry out of the cracks and crevices of rocks.
Alto. compressiceps are better predators in the open water than calvus are, so I might be more weary of them.. but even there haven't lost adult shellies either.