Everytime before i added fish i tried all the other methods and within hours or the following day the fish would croak. So I started my drip line after I purchased six damels and left it running for about 2.5 hours since I was no rush and they were in a big container. Well after the drip was over I placed them in the tank and now its been 3 days and no deaths. Happy eating fish and moving all over the place. Not saying I am out of the woods but i will preach on the drip method....