chain will likely rust within 1 to 2 years of exposed to chronic moisture or humidity. Consider PVC pipe cut in 4 to 6 inch lengths filled with concrete or sand mix and sealed on either end with end caps.

Try sewing in stainless steel washers.

We used weighted magnets and they didn’t work, then we tried the weighted chain in the bottom hem. Both became weapons of destruction in the slightest breeze. Any pointers??

I've looked all over the internet. No solution. I am giving up.

Aluminum chain works. I use it all the time on my custom outdoor draperies.