It is not necessary to acclimate corals or be very precise about making temperature adjustments (e.g. floating the bag). The most important thing is to get the corals into good moving water as soon as possible. Corals are passive creatures, and their tissues create natural gradients between them and the outside environment, so acclimating corals is somewhat redundant. Temperature differences of 4-5 degrees Celsius are not a problem for stony corals.

Additionally, stony corals that have become too cold (below 21 degrees Celsius) or too hot (above 29 degrees Celsius) in transit benefit from being transferred to water at a normal temperature (24.5 – 25.5 degrees Celsius) without delay. The main thing to check is that the SALINITY of the water is more or less close. Acropora may bleach if there is a big drop in salinity, but an increase is less problematic. We keep our salinity at 1.026 specific gravity (35 PSU).