I am looking at getting my halfmoon betta a companion (or two) to assist in clean up. He is in a 3 gallon planted (heated and filtered) tank. So far my plants are using up all of the nitrates that Norbert alone is able to produce. I had always planned on getting him a companion invertebrate, they are fun to watch. I was thinking about amano shrimp or a nerite snail, with preference to the shrimp. I just wanted to get some feed back on here which critter would ultimately be the better choice and as to numbers (in the case of the shrimp). Thanks!!