I bought a small quantity of freshly washed black worms today from my lfs. First time I bought them. My Anomalochromis thomasi and Alestopetersius caudalis went wild for the worms. I have never seen them get so excited before. Fun to watch. The lfs told me to keep them refrigerated and to wash them daily in fresh water over a mesh like cheese cloth. How many days will they stay alive? Thanks.