Greetings! I live in the Harrisburg area of Pennsylvania (central). I found my zone to be 6b. I have, I believe, is a 200-gallon preformed pond (pictured) that I just put in this summer. I'm loving it! I have four fantails and a frog just happen to also make a home here! My pump is submerge d to the very bottom. Although hose is exposed to the upper container where my waterfall is. I am getting contradicting advice from so many. Will my pond freeze solid? I was hoping to be able to let the fish go dormant over the winter and do what is necessary to keep them alive. Which brings me to my next question. I read all about pond breathers, floating heaters/deicers, air stones...not sure what would be recommended for my area.