I know I may be getting you some water soluble fert., but in the meatime. I would think the high phosphorus tobacco fert should work. Treat it like other granular types. That is keep it away from the bottom sediments. This may mean bulding platforms or placing it in buckets with small holes so it can slowly leaching into the upper portions of the water. If you have not found the liquid or water soluble yet, this would be much better than the 20-20-5 choice. Good luck.


Greg Grimes
www.lakework.com