My tank is 10 gallons, spread out more horizontally than vertically (it's a standard horizontal tank). My question is if I should get an Aquaclear 20 or 30 power filter for it. I know Bettas don't like a lot of movement, so I'd definately lower it's output to minimum.
I would choose 20, but then again... I'm thinking, maybe in the future I could get a 30 gallon aquarium and put some angel fish in there, so the 30 would be more useful on the long run and a better investment.
I don't want fin damage though. Is there that much difference in the strength of the flow between the two??
The Aquaclear 30 is rated for tanks from 10 gallons to 30. The Aquaclear 20 for 5 to 20 gallon, btw.