My rainbow cichlids started breeding and my Denison's barbs have culled quite a few of my fry and so I now want to move them out of my 40 breeder and into another tank. I have caught two of them but the third has eluded me and it's taken me now over an hour with no results. I have lowered the water level, used a towel to try and box him in but to no avail. Denison's Barbs are extremely sleek and very quick fish and I have never had a harder time catching a fish than right now Any tips you use would be helpful.