Mold in storage
I've been making my own saurkraut for about 2 years - with 1.5-2% as per the recipe that came with my crock. Today I noticed that two full, as yet unopened jars in the refrigerator both have a kind of mold growing in the top of the kraut. I've never seen this before. Is it bad? Its legs are going to be a long way down, right? 
Best Answer
Well, Sandor Ellix Katz writes in The Art of Fermentation that some mould on the top is not a problem, you can scrape it away. But for me, this seems too much, I would not eat it.
From what I see on your picture, your problem might be, that the kraut is not covered with liquid. For fermentation you need anaerobic conditions, meaning that the kraut is not on the air, it is fully covered with brine. Mould needs aerobic conditions, meaning it grows where the kraut is on air. Try to make sure the brine covers your kraut the next time you making it again.
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Quick Answer about "Mold in storage"
Mold is a consequence of high humidity in a closed space, and this problem can affect your home and your storage unit. If the humidity is above 50%, mold outbreaks can occur. Anything within your storage unit can become vulnerable if moisture begins to grow.How do I get rid of mold in my storage?
Using the brush and soap/detergent, remove as much mold as you can. Once the most visible spots are gone, wet the affected area with a mixture of one and a half cups of bleach in a gallon of water. Let the bleach sit for about 15 minutes, then scrub the spot again before rinsing it with clean water.Does furniture mold in storage?
Mold can grow on any type of furniture. If you catch it early, you might be able to clean off the mold. But sometimes the spores grow deep into the material making it more difficult to remove. Mold growth requires moist environments, so the key is choosing a storage unit that stays dry.Why is there mold in my storage unit?
Tip #1- Make Sure Everything You Store is As Dry as Possible Mold, for those not in the know, usually forms where there's moisture. Combine moisture with warm air, and you've got the perfect breeding ground for mold. That's why you should do your best to make sure everything being stored is as dry as possible.How do you stop moisture in a storage unit?
To keep your belongings dry, simply place the store-bought silica gel packs in your boxes before sealing them. It can also be helpful to place a few dehumidifying packs around the storage unit to aid with the moisture-control process. To use charcoal, wrap some charcoal briquettes with fabric and store them in a box.High-Density Mold Storage and Retrieval System | Green Valley Manufacturing, Inc.
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Answer 2
This will raise the pH and cause a potential for botulism growth if you stored them >36F. I do this stuff for a living so toss them please. Some mold on the top of a fermentation vat is normal in the jar is not normal. As stated above I think you need to put more liquid in the jars and less product next time.
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