Fertilaid for men

Hi I've been ttc for 6 months and was so thinking about getting this for my husband he smoked weed and I think his sperm might be a little slow we haven't gone to get it checked out yet cause I'm just trying to have it all go right before having to do that. But was wondering if someone has tried this and was successful or if there was anything else that they liked instead? Thank you I'm willing to try stuff as well. Thanks guys