I have had it for 3 years in a pond with goldfish, it works non-stop winter and summer without any problems, I would only change it for one with a higher flow

It works on a daily basis, day and night.
It doesn't chew anything, for two months now.
Its filter needs weekly cleaning.

I used it in a small pond with goldfish. Satisfied with how it worked. Unfortunately, it got stuck within the first year of operation, but without continuous use, which makes it somewhat reasonable to give up on it due to the condition of the water.

I have it for a year and it works without any problem. I use it for about 3 hours per week. It throws water over a meter, it has a thick long cord. Its disadvantage is that it makes noise. I have it on a balcony fountain, if you are further away it may not be annoying.