I have a 13 gallon tank from Aqueon, and was thinking about getting the larger filter for it. Right now I have the quiet flow 10 that it came with but am thinking of getting the 20 because the filer cartridges seem to be lasting 3 weeks instead of 4 or 5. Every time I test the water it's fine and the fish aren't acting odd at all and I do a water change every week. I have 5 neons, a betta, amano shrimp and now a snail. My concern is will the bigger filter have a bigger current and will the neons be hurt or have trouble with it?