Hi. I have two new fire bellies and I have some questions about water filters:

- What kind is good, i want something discrete and not too loud. (not a fancy waterfall) UK.

- How often do you have to change the water when you have a filter? And is there something that makes changing water easy? the tank is so heavy i can hardly lift it.

- How long does it have to be on for a day?

At the moment i have just a pond bowl but they seem a bit depressed because they came from a home with a full swimming area which they spent all their time in. I want to make it nice for them.

Thanks for reading. Any help will be really appreciated ^_^