This capture method works wonders and i really think works for most fish except extremely passive fish. Put your normal feeding in a net and put the net behind a powerhead so all the food doesnt get blown away. If your fish dont take notice to it, put it in a spot with more flow so the food kind of leaks out. Do this every feeding and if you took the approach to let the food "leak out", slowly put it in less flow and watch your fish keep going after it more. Skip your normal feedings for a day and put the net in. I was shocked to see my blenny, clown, and chromis just Attack the net! If i wanted to catch them, it would be so easy. This also helps to rinse food if you keep them in a jug with water. If you need to catch a fish, try this and tell me how it goes. Hopefully youll have the same success I did.