I'm getting ready to set up a 5.5-gallon tank with a betta fish and am trying to decide between filtration options. I'm new to betta fish, but what I've read leads me to believe that I want filtration of about 2x3 times the aquarium's capacity. Does that sound reasonable?
I of course don't want anything that will take up a lot of interior space, and I don't want to get into modifying filters or pumps. So I've found two options so far that appeal to me:
- Undergravel filter with something like an Aqua Clear 5 or Marina Cool air. I'll probably start with silk plants, so a UGF should work. My only concern is the gravel's resistance (I'll probably have about an inch of medium gravel). Would this setup result in the rate of filtration I should have for this aquarium?
- Tetra Whisper 3i - It's rated for 1 to 3-gallon aquariums (basically plastic betta kits), but it's GPH is in the range I'm looking for. Would it matter that my aquarium is a little bigger than what the filter is intended for?
- A small sponge filter, as long as it doesn't take a huge amount of space.
Are there any options I might be missing?