I've used CO2 with an airstone to sedate fish in a fish only system. Not sure how the corals and inverts would fare. Basically puts the fish to sleep in a minute or two.
Wow. So many good ideas and accompanying strong opinions... I had thought/ tried every one of them except for the partition idea. At the moment I'm thinking about devising a device that would consist of a large net that would be held open with a trigger mechanism. This would allow the user to release the trigger and rapidly close the net. I think this would probably be a lot cheaper than building an acrylic trap of the same size. But again, I'm just throwing an idea out there. Wouldn't want to finally get that Darwin award for applying a concept I utilized doing doctoral level ichthyology research. Thanks again for all the suggestions everybody.
Just a note, if you do or don't catch that damsel. I suggest from now on feeding your fish with a net. So the fish will get use to the net and jump right in, making a easier catch. I am currently using this mrthod.
Wouldn't want to finally get that Darwin award for applying a concept I utilized doing doctoral level ichthyology research. Thanks again for all the suggestions everybody.
well, you did leave that part out! I believe a few grad students may have been in the running, so education doesn't give you an automatic pass, anyway.
would you advise someone without any experience to try that in their home tank? you'd seem to be the person to know the most whether it is feasible, since you are one of the few people on this site that has done it. was the research in the field or in tanks? I still don't think it's a good idea. partition, fish traps, barbless hooks, net feeding, bringing down water level, etc. are all good ideas I'd try first. I've tried all of these at various times in the last 30+ years I've kept marine fish and they all work.
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