you should be able to get it at the grocery store for like $3-$4

Also...i uh...know a guy...who mixed at a 4tbl/gal ratio on accident for 2 waterings then 2tbl/gal for 2 waterings with a nute water/plain water/molassis water regimen, then switching to plain water/molassis water towards the end and just plain water for the last week, and the main bud grew HUGE but it seemed to take a lot longer for it to finish