I cycled the water in the 5 gal for 24 hours. Then I added an equal amount of 50% to take the place of 50% of the 5 gal, from the water from the 18 gal; where the puffer was. With that said, I took 50% of the 5 gal water out, that had been cycling for 24 hours, in order to add 50% from the 18...