I would just take a t-break, why even mess with that, unless I have medical condition like seizures or something I dont need cannabis all the time. I have made ISO with bud that had a couple gnats on it (I mean less than 5) but that's not a health issue, this is. I'm only speaking for myself intentionally though I dont know if you are really depressed then maybe you need cannabis, if thats the case, just buy a cheap $100 ounce and a decent vaporizer and it will last 3 months of occasional usage.