Not bugs. Specifically it’s calcium deficiency
Dry your egg shells for a few days. I use a coffee grinder to powder the shells, but simply crushing the shells up with a spoon also works. Then just cover over the shells with vinegar. Place a top or baggie over the container and let it sit. You should notice the bubbles go away in a day or two. You can test the solution, looking for a neutral 7.0. I just wait till it doesn’t smell like vinegar anymore, and then I stick my finger in and taste it for vinegar. No taste, strain the cloudy calcium water out, and then add it to a gallon of water with a 1/2 tsp of Epsom salt. Voilà organic calmag. I’ve also done this using oyster flower