Normal blender can be used and it will still be delicious. However the soup may have a chunkier texture and the ingredients may not integrate as well.
No salt is required as the brine of the sauerkraut contains salt and vinegar. Also, celery contains natural salt which enhanced the salty flavour.
Chili may be omitted if it is too spicy for your palate or simply remove the seeds to reduce the spiciness.
Feel free to add more water if you prefer a soup with runnier texture. This recipe also works well as a dip cream, just use less water or use more cashew nuts.
Cashew nuts can be replaced with other ingredients, like avocadoes, sunflower seeds, almond nuts, and even tofu!