How to get photos from one iPad to another
"I had to open a new Apple account"
That was the mistake. 

Nothing on the old iPad is owned by the owner of the new iPad. As far as Apple are concerned, the two accounts are totally &amp; utterly separate.. Your choices now are iCloud sharing, as mentioned, or maybe setting up Family Sharing or, imo probably the best choice, releasing the new iPad from its current owner &amp; re-assigning it to the right one, as though you were selling it to someone else - What to do before you sell, give away or trade in your iPhone, iPad or iPod touch