These mandarins may be an inexpensive beautiful fish, but they are difficult to keep alive if they are not supplied with the proper food. 99% of them will not eat frozen or flake or pellet foods. Some have been trained to eat frozen, but must be fed in a specific way so that they actually get the food and the other fish do not eat it first. Some have built feeding boxes that they put the food into for them. If you rely on food floating around in the water column they will not get it and they will starve to death. IMO Don’t get a fish that you may just starve to death just because it’s beautiful and cheep. Wait until your system is mature enough to sustain it. Then you will be able to enjoy it for its entire lifetime.