If you raise crayfish, all the things you mentioned will become feed, including aquatic plants. Even if you raise crayfish alone, it is not recommended to raise multiple crayfish together, unless you have time to keep an eye on the ones that are about to shell out and fish them out in time and isolate them separately. , for crystal shrimps, lantern fish will eat small shrimps, crystal shrimps, ornamental snails, and aquatic plants can be mixed together. Fish and shrimps should not be mixed. No matter what, they will not be suitable, and one of them will die