One of my adult male bn settled in my 6 inch clown loach cave; he came back and discovered it there - i don't know exactly what happened but i never saw the bn again....My work supervisor gave me 13 golden mystery snails and 3 regular BNP juveniles. The snails are randomly distributed as are the BNP. I added one BNP to the 260 as it has a lot of brown diatom. The female choco was 7ft away when I introduced the BNP to the tank. She was there instantly and had it in her mouth. I figured it was over for the free BNP and was glad I hadn’t purchased it. She spit it out faster than she gobbled it up. It darted away under something and she gave up chasing.