I just got them another brand new litter box, so I know it's not because it's old and like I said, this JUST started, They have 2 large covered litter boxes already.

Is there anything else I can do TO this litter to prevent it from smelling? It's driving my fiance nuts, he's very sensitive to this stuff.

I have a waterer for my cats they have always seemed to drink enough, but it's not one of those fountains, I can not afford the $50.00 right now.