Very creative! But there’s always the risk of the bag opening or breaking and diluting your brine. There are glass “pickling weights” that do the job as well with no risk of dilluting anything! I’ve also heard of people using large glass marbles or pebbles, the sort used by florists in clear glass vases instead of the “standard” metal frog for flower arranging. They work very well and are available in a variety of colors, just in case you keep your jar of preserved lemons on the counter top. And then the Japanese also make “pickling jars” that include a glass weight to keep things immersed for any type of pickling humans do. Here are a few amazon.com links to show you what I’m talking about. And good luck!
fermentation weights:
Japanese pickling jar:
glass pebbles:
