Betta Fish: Hi, I just got a heater for my betta yesterday , after I installed it I went to sleep, when I woke up i found this. Is it a bubble nest?

Hi, I just got a heater for my betta yesterday , after I installed it I went to sleep, when I woke up i found this. Is it a bubble nest?

https://i.redd.it/k7q5dpp530xf1.jpeg

Posted by Kitchen-Ice-3930