Drip acclimation is a process by which the water from the new tank is slowly mixed with the old water via a drip system. This method slowly adjusts the water parameters of the old water to be more in line with the new water. I usually drip acclimate until 100% of the old water has been replaced with the new water.
For a Bala Shark I would put him in a 5 gallon bucket about half way full of the old water. Place the bucket on the floor next to the new tank. Run airline tubing into the new tank and start a siphon via your preferred method. There are a number of methods to control the drip rate. Most people just tie a knot in the air line tubing, I use a cheapo airline flow valve. Once you have the drip set you can place the tubing into the bucket and let the dripping begin. I usually increase my drip rate every half hour or so.
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