at the store, we either use 2 nets, or if there are many decorations in the tank (algea eaters and plecks) well use our hand to guide the fish into the net, but there is a few tips. make sure you put the net you are going to use to catch him (the stationary net) in the tank, near one of the corners with the bag on the oposite side of where the fish is comming in, and make shure one side of the net is up against the glass, and the other is against the gravel. then you have to kinda use the other net to corner him in, and if u start slow, and then move a bit quicker near the end, he might swin into the still net as cover. if that doesnt work, and he keeps going over the net, then use the to nets to corner him into the corner of the tank, then slowly move up toward the top making a T with the nets so he cant swim under, or around. always works, even on cichlids.