I'm relatively new to fish keeping, so forgive my ignorance. I've been interested in sponge filters, and read that you need an airpump&stone or a powerhead to use it. What exactly are they? And is one better than the other?
There isn't much difference between these two types, they both work the same way. The air pump forces air through the filter's tubing, which in turn also pulls tank water through the sponge due to the pressure created by the air. The water is then also filtered by the bacteria living on the sponge. This is the safest type of filter you can use for bettas and betta fry because there is no way for them to be sucked into any sort of intake. Sponge filters are also very easy to clean, just squeeze them out in old tank water once a month and they will work indefinitely
Please let me know if you need further clarification on any of this stuff. I know it seems like a lot of stuff compared to a simple intake filter, but it's not too complicated once you understand how it all works, and sponge filters are truly superior and safer.
Alright so basically: get a basic sponge filter, air pump, check valve to prevent messing up the pump. So one end of the tube would connect to the inside of the sponge, and the other to the air pump?
Thank you so much, that cleared everything up for me!
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