I just got them two days ago and they are so cute, less than an inch in length i puth them with my fire mouths (Also less than an inch , all three) my green severum(Whos only about three inches long and 2 inches tall) and my 4 inch pleco in a 29 gallon with rocks and caves and plants every were they are very active day and night i love them. But now for the questions, What all should i give them to keep them happy and is there any way to hear them talk with out taking them out of the water? I just don't like to shock my fish like that, the pleco doesn't care if i pick him up and neither does jack my severum.