I am new to K2.
Trying to use it on a web site.
How do I enable captcha for k2 comments.
Should I enable the default joomla recpatcha plugin or is there is an addon for k2.
Incase the website owner wants a different cpatcha, can it be done.

K2 has its own captcha settings. For them to work properly Joomla!'s recaptcha should be disabled.

the default recaptcha is not enabled. Still k2 is not showing the cpatcha below the comments.

solved. My fault, did not get into parameters.

Nice to hear that the issue is solved.