Can I mix normal power steering fluid with the lucas power steering stop leak?

My mechanic replaced my normal power steering fluid with “Lucus power steering stop leak” to seal up a small pin sized hole in my PS hose. Its been a couple months and my PS fluid is just below the dotted dash mark (not sure if that’s low or not) But I was wondering may I just add normal PS fluid now or do I have to keep adding the lucus stuff. Do I need to flush out the lucus before I put in my normal PS fluid? I would like to know if I can just add normal fluid now. Also is the lucus safe to leave in my car if I even wanted to?