If you WANT them to eat the goldfish then just leave them in there. On the occasions that my RBP get feeders I NEVER see them eat them. They just sort of slowly disappear. I could be out of the room or it could be overnight. They just sort of dwindle.
When I first got mine I didn't see them eat for several months. I knew that they did eat cause the food would disappear but the shrimp or smelts would lay there until they were ready. Never had any water problems because of this.
When I first got mine I didn't see them eat for several months. I knew that they did eat cause the food would disappear but the shrimp or smelts would lay there until they were ready. Never had any water problems because of this.