"Marc Levenson" wrote in message ...
Use a decent pump, and pump out your old water. You should be able to pump out
10 or 20 gallons in mere minutes, and then use the same pump to send your new
water into the tank. The anemone can handle three or four minutes in the air.

Would you recommend the same for a sea cucumber staying at the top?
I am talking about yellow Colochirus robustus - for some reason it always
prefers the place at the water surface...