i did my research on the eclipse/marineland hexagon 5 gallon tanks and saw that everyone has problems with the filters. i was walking through the store one day and realized they had them on sale for like half the price of pretty much every similar sized tank. i ended up going against my better judgment and decided i would try it for the price. naturally i got it set up and the filter wasnt filtering. you could here something, but no water was pumping. i messed with it and eventually got it to work, although it still doesnt seem like it pumps enough water.. but then again the low current will probably work well for a betta. I'm not positive whether i should take it down and try to return it or to hold onto it and see how it turns out. i was convinced to take it back, but havent found anything in the 5-7 gallon range that i was hugely impressed by. i can either keep it, get another similar sized tank, or go 10 gallon. the only thing with the 10 is i hate wasting the room of a 10 gallon with just one fish. i know the betta would enjoy the space, it just seems like lots of room to be wasting.