The only food missing from my fishes’ diet are live foods. For a variety of reasons I can’t start my own cultures (ie. spouse objections). I finally found a lfs where I can buy live black worms. How do estimate how many worms to put into the tank? In my 20 gallon community tank I have seven 1/2 inch endlers, four 1 inch dwarf platys and a pair of 2.5 inch Mollys. In my 60 gallon tank I have six 2 inch a. thomasi, six 1.5 inch yellow tail Congo tetras and a pair of p. pulcher Ndonga.