I wouldn't. DP's are really little. I bet a 4 inch cichlid could eat one. If not, the 4 inch cichlid will likely be a 6 inch cichlid some day. The 1 inch DP will never grow. Eventual feeder![]()
They run risk of being eaten. Also The DP can nip your fish, even the bigger ones. Don't let the size fool you. They can kill bigger fish. I think you are better off throwing it in your tank with the tetras but they might be harassed.
Leave them in there. They can be dithers for the puffers. You can put 15-20 dwarf puffers in a 40g comfortable IMO.