I have two stories to illustrate the survivability of corals. As most of you know, I recently had a tank wall crack that deposited over two thirds of the tank water onto my basement floor. My rockwork in that tank went to the very top rim. Therefore all of the corals in the top two thirds were out of the water, possibly for hours. I know this since the GFI circuit tripped from the leakage and the water was quite cold by the time I discovered the leak at about 3;30 in the morning. Other than the sps frags that were nearest to the top of the rockwork, all of the other corals that were out of the water including zoos, duncans, torch corals, various leathers and sinularia....all survived. They looked like hell for a couple of days but nonetheless pulled through.
The next day, I had a shipment of ricordea, crabs, and zoos arrive from Sealife.inc that got lost in transit and were supposed to arrive several days earlier. They were thus in transit for five days. I opened the box expecting to see that everything had perished but amazingly everything was fine. The water in each plastic bag was cold and completely turgid such that you could barely see the contents. And yet no losses.
So on one level, we think of corals as extremely delicate and fragile, and yet they occasionally seem to be able to tolerate very toxic conditions. On the other hand, i've had seemingly healthy corals suddenly bleach out for no apparent reason. Go figure!
Certainly we know that many corals at low tide in tropical reefs, can be out of the water for periods of time so i suppose this shouldn't be so shocking.
The next day, I had a shipment of ricordea, crabs, and zoos arrive from Sealife.inc that got lost in transit and were supposed to arrive several days earlier. They were thus in transit for five days. I opened the box expecting to see that everything had perished but amazingly everything was fine. The water in each plastic bag was cold and completely turgid such that you could barely see the contents. And yet no losses.
So on one level, we think of corals as extremely delicate and fragile, and yet they occasionally seem to be able to tolerate very toxic conditions. On the other hand, i've had seemingly healthy corals suddenly bleach out for no apparent reason. Go figure!
Certainly we know that many corals at low tide in tropical reefs, can be out of the water for periods of time so i suppose this shouldn't be so shocking.