i have sand in my tank and i want to prevent the formation of anaerobic bacteria which will release toxins. Malaysian trumpet snails would be perfect and they would clean up nicely, but im worried about them prodding and hurting my bichirs because of theyre conical shell. what do u think? also, would the bichirs eat the mts? would they eat any snails for that matter? i have a surplus of rams horns that would be a good treat if they actually ate them