I might see if I can buy some of those silicon packs online, rather than wait to collect them from things I buy. Summer is our most humid time, so the sooner I find a solution, the better! I'll bet Amazon has them.
In addition to mold, other sad things you might find when you take your ponies out of storage and look them over:
1. The glitter from some of your G1 ponies' symbols might be just gone.
2. You might find regrind on your dark-colored G1 ponies that didn't have it before.
3. Your Divine Shine G3's might have completely lost their glitter (except for their heads).
4. You find a pile of G3 hats and headbands in the bottom of your storage box because over time the elastics just snap and they all fell off the ponies' heads.
Oh my poor ponies. But it's not too bad. At least they clean up okay, for the most part. And all the accessories are still here, just need new elastics.
If there's a better solution than rubbermaid totes, I'd love to hear it. Cardboard boxes didn't cut it, I was hoping the rubbermaid totes would be more airtight and condensation wouldn't get in there. :\