How do i stop small bits of cabbage from floating past my weight to the surface of the sauerkraut brine? it's the 3rd day of ferment and i'm using a Ball Spring weight with a fermentation lid. I tried putting parchment paper under the weight and that did not work at all, it just stirred up more bits to float 
Tomato sauce and paste are not the same thing. Tomato paste is essentially a concentrated tomato with some water removed that is then preserved. It is generally only used as an ingredient. Tomato sauce is immensely variable and usually has a variety of other ingredients added resulting in something to actually eat. 