Am I over reacting about my husbands pot use?

If you feel that talking to him about the consequences of his actions won't help, how else can you possibly help him solve it?

Alcohol and pot affect the brain first, so he needs to get help for his addictive personality. You don't give your children's ages, but what sort of role model is he for them? And what sort of role model are you for putting up with such behaviour? Do you really want your children to grow up thinking that it is all acceptable? Actions speak louder than words, and especially as your words aren't working, you need to take some action.  

Good Luck!

Your Hubby didn't cure his addictions he just changed it. His problem is he seeks a chemical escape from his real life - whether that be through excessive alcohol or pot. He needs to deal with whatever is driving him to take that way, by getting some therapy for it,  before he will be free of any addictions. 

Geez this could have been MY situation if I had married my EX and had children with him! 

recovering alcoholic? Not anymore, he just found a replacement drug.  He should already know that side of things and if he doesn't, he never was actually recovering, he was just waiting for his next fix so to speak. Addicts are addicts, it's just the choice of drug that changes, but all the same crap is still there.

My suggestion would be to organize an intervention. Gather friends, family members, anyone willing to support you in this. Sit your husband down and let him know how his excessive pot use is adversely affecting you, his children, as well as other loved ones. Ask that he please give up pot smoking altogether just as he did alcohol; like some addicts, he has simply traded in the abuse of one substance (alcohol) for another (pot).

I also suggest that you offer to send him to a rehab facility to aid him in his recovery from addiction. The facility will not only be beneficial as far as ending the use of pot, it will also target the addictive behavior so that your husband does not fall into the abuse of alternative substances (i.e. painkillers, prescribed medication, opioids, etc.) 

If the intervention fails to work and if your husband refuses to go to rehab or receive any other sort of help for his addictive behavior, then my last and final suggestion is separation. He needs a wake-up call and this may be the only way he finally sees the light: if he does not do anything to address his addiction issues, he WILL lose his family. Take the kids and go stay with a family member, a friend, a hotel room, or a women's shelter if there are no other options.

He's an addict.  He's switched his addiction from alcohol to marijuana.  You can't change him.  He has to change himself.  Find a local chapter of Al-Anon for help and support.  And since children are involved, be prepared to leave him if he refuses to change or get help.