would a school of sidthimunki work? being more diurnal will modesta leave them alone? my modesta is 6" and the most interresting fish Ive had in years. I have lots of simple low-light plants and have never found more than 2 snails at a time (my loach loves snails) My book says "they may be less well-disposed toward similar species." What exatly does this mean? What would be the best match for a adult Redtail Loach in a 40 gal.?