Lotus seeds needs to be scarified in order to germinate. Online I found 2 methods. One is to use a knife and cut a slit until you see the white parts. Another is to file the outer coating until the white part shows. I tried the filing method, I gave up after an hour. Cutting a slit is tough but much easier than filing down. (In nature lotus seeds spend 50 to 100 years at the bottom of a pond before they germinate. You can see how tough that coat is)
To get the seeds to germinate you're suppose to soak the seeds in distilled or rain water. I put the seeds in a jar and covered them with rain water that I collected. Place the seeds in a warm location and change the water every few hours when it gets cloudy.
It's only been a few hours since I started the seeds but I have noticed something. From what I read online the outside coating gets lumpy due to water absorption. That happens after a few days. The one that I filed down is already lumpy. We'll see if that speeds it up in a few days.