My goldfish pond froze over…

Looks like ranchu goldfish can take winter like a champ. I was not expecting this pond to fully freeze over given I have bth a bubbler and a 300 watt heating rod but it still froze even with that, luckily it seems the ranchus had no issue with it, this is promising for expanding further ponds outside in the next season and overwintering them. Buy Luke’s Goldies Goldie bites!: https://lukesgoldies.com/products/gol... Buy the Lil Dumpy plushy!: https://lukesgoldies.com/products/lil... Buy the Jill Plushy!: https://lukesgoldies.com/products/jil... My MERCH!!: https://lukesgoldies.com/collections/all The sponge filters I use: https://amzn.to/4jqPiiO