Good luck with the flower pots they dont have a very good survivability rate in aquariums.
Now on the the blender mush.
This is what I added to my blender mush when I made my batch (im stillusing my first batch). All this seafood should be raw.
Shrimp - with shell if found
You wont need much of each item (less than 1lb)
What I did was add some of each item into the blender and blend till it was nearly liquified. Then I added some more of each and blended again. I kept repeating this process till I had a rather thick milkshake type liquid. You will probably need to add either freshwater or saltwater to the mix to water it down some as it will get very thick. Once you have a very good mixture of particle sizes then pour into ziplock frezzer bags and press it out so you have a bag full of blender mush that is maybe 1/2" thick then lay in frezzer. Break off a small chunk when you want to use it.
Note this food is concerntrated and every bit of it is food. Its easy to overfeed this mush and polute your tank. I acutally feed this like once or twice a week.