Sorry for the late update, been busy at work, so here it is. I tired the bottle in the tank, boy this little guy knows, I saw him hitting the bottle with his tail, so after the third day the bottle was a failure, than I went with the flashlight, made the room dark, ( all lights off no big deal) got my flashlight (LED
) put my net in and bam!!! Light on and I blinded him and caught him!!!! Wow I was amazed how easy that was.. Funny thing though, I can't get rid of him, he is mine, I pick him, and gonna keep him, so all this was a educational experience. Btw I did upgrade to a 90 gallon and my Neon Damsel is now in a bigger space, I have not seen any territorial issues. Yet!
Again thanks you all for the inputs