Work / Is 6500 PLN salary gross enough to live on for a small family in Wroclaw? [20]

I'm from Algeria and I had an offer for a permanent job in Poland, Wroclaw, and I'm currently negotiating the salary and would like to know if 6500 PLN Gross is enough to live and keep spare for a small family parents and a small kid ?

Also want to know how smooth is family reunification to be processed for a person that has work permit and residence card.
please let me know what do you think and thanks for your advice in advance.
BR