I use Trphy Maker in 5 gallon buckets and it works fine. I drill holes in the top and about 8 inches down the sides from the top. Then put in the fertilizer, turn it upside down, weigh down the handle, and set it adrift. Takes about three weeks with wave motion to dissolve the fertilizer. I repeat the process about every two months. Works fine. Take a note, this does NOT work with Cutrine Plus granules for weed control. They never dissolve... ;\) .