hi there guys i want to start farming earth worms for my koi when i get home, have had a look around seen these plastic boxes on top of each other 3 high, but cant find a pic of what it looks like inside befor you put the soil in, also what earthworm is good for koi see you get diffrent types and what should i feed the earthworms that will be good for the koi. there is a guy that selling a 3 box high worm farm with starter kit worms and all for 450 rand is that a good price or should i try making it myself.