You can find standard sheets without the fitted ones. I used them. There’s enough extra sheet to fit around the mattress without being pulled out by the wave action. That waterbed heater was one reason I loved mine. If the bed’s warm you don’t need an electric blanket or heavy comforter.
My waterbed kept springing a leak. Upon closer examination, I realized the holes resulted from the roommate’s cat. He would come into the bedroom, hook his claws into the bed, and pull himself up onto his hind legs so he could spy on my cat, asleep in the middle of the bed. I don’t remember how I stopped it, but it didn’t involve a new kitty-shaped rug. I had under-bed storage and 4 drawers to the side, so the mattress sat high. I loved that bed, but when I moved, I gave it up because finding a waterbed mattress was hard.
I used to have “chase dreams” where someone was chasing me and I needed to get up and run. I’d wake up with my heart pounding, and since I was already up…I finally caught on and haven’t had that type of dream anymore.
You can find standard sheets without the fitted ones. I used them. There’s enough extra sheet to fit around the mattress without being pulled out by the wave action. That waterbed heater was one reason I loved mine. If the bed’s warm you don’t need an electric blanket or heavy comforter.