Basic fish stock:, White fish bones & heads (seabream or seabass), Salt, Water, Seasonings:, Celery, Carrot, Onion, Fennel bulb, Parsley, Spring onions
Those days are over when you needed to clean octopus with salt. Try this alternative simple idea and from now on, cooking octopus will be a walk in the park.
I tried making this with soy sauce or dashi granules but then I tried it with Dashida (a Korean seasoning) and it made my previous efforts look so bad!