Need ideas for catching two fish

[big mamma]

So im looking to trade in two of my fish that ive had for a while. One is a yellow tang and the other is a marine betta. Ive got my tank exactly the way I want it and I know if I tear it down to get them out I won't recreate what ive made and I will hate myself. I know catching the tang will be easier than the marine betta because I can maybe build a trap and bait it with seaweed. But im not sure how to catch the marine betta.

Any ideas or maybe fish trap designs would be awesome.

aqua medic worked great for me.

 

[McPuff]

Before you tear things apart, try to fishing method I described above. You'll be happy you did.

 

[scooter31707]

I have use several options and the 1 that worked for me was draining the tank water into brute cans just enough the fish was barely moving and breathing. Caught the fish and fill the tank back up. It took all of 18 minutes.