This method is considered more advanced. It is geared toward sensitive inhabitants such as corals, shrimp, sea stars, and wrasses. You will need airline tubing and must be willing to monitor the entire process. Gather a clean, 3 or 5-gallon bucket designated for aquarium use only. If acclimating both fish and invertebrates, use a separate bucket for each.
- Start with Steps 1-3 of the floating method to acclimate water temperature.
- Carefully empty the contents of the bags (including the water) into the buckets (Fig. G), making sure not to expose sensitive invertebrates to the air. Depending on the amount of water in each bag, this may require tilting the bucket at a 45 degree angle to make sure the animals are fully submerged (Fig. H). You may need a prop or wedge to help hold the bucket in this position until there is enough liquid in the bucket to put it back to a level position.
- Using airline tubing, set up and run a siphon drip line from the main aquarium to each bucket. You’ll need separate airline tubing for each bucket used. Tie several loose knots in the airline tubing, or use a plastic or other non-metal airline control valve, (Fig. I), to regulate flow from the aquarium. It is also a good idea to secure the airline tubing in place with an airline holder. The Doctors Foster and Smith Acclimation Kit is a convenient alternative that simplifies the drip acclimation process.
- Begin a siphon by sucking on the end of the airline tubing you'll be placing into each of the buckets. When water begins flowing through the tubing, adjust the drip (by tightening one of the knots or adjusting the control valve) to a rate of about 2-4 drips per second (Fig. J).
- When the water volume in the bucket doubles, discard half and begin the drip again until the volume doubles once more – about one hour.
- At this point, the specimens can be transferred to the aquarium. Sponges, clams, and gorgonias should never be directly exposed to air. Gently scoop them out of the drip bucket with the specimen bag, making sure they’re fully covered in water. Submerge the bag underwater in the aquarium and gently remove the specimen from the bag. Next, seal off the bag underwater by twisting the opening, and remove it from the aquarium. Discard both the bag and the enclosed water. A tiny amount of the diluted water will escape into the aquarium; this is O.K. Also, to avoid damage, please remember never to touch the "fleshy" part of live coral when handling.