clayellison, i too am "experimenting" with 18-46-0. i got it from my local southern states store. (just $17 per 100 lbs) i was told that it is not water soluable. i put 20 lbs. in each of 8 nylon feed bags just 2 days ago and floated it with 1 gallon bottles near my diffusers, with a brick on a line to hold them in place. the bags are nearly empty already, and i believe that the diffusers are mixing the fertilizer into the water column. at least i hope so. i put out about 20 lbs per acre in my 8 acre lake, since i'd just a week prior used the last of my water soluable pond fertilizer at 4 lbs per acre. i am using these rates because i do NOT yet have a bloom established. i hoping to kind of mirror the "southern excellence e-z buckets" method of fertilizing. i live in rural southern virginia and have no place locally to pick-up pond fertilizer; and it is expensive to ship enough for a pond my size. i hope this works. i'll keep you and anyone else who might be interested up to date on how this works. jb

Take great care of it, or let someone else have it.