| I purchased this for a betta fish, which was a gift for my cats. This model was perfect because the lid screws on, which eliminates any fear of my cats lifting the lid to get to the fish. There is a small hole at the top, so you don't have to unscrew the lid to feed the fish. The "aqua gems" cover the bottom, but I added some gravel for additional covering. Also, the aqua gems are light, and you lose some when changing the water, so some other covering will likely need to be added eventually. The one negative I found is that the light is basically useless. It illuminates nothing and the batteries die quickly. Other than that, I'm very satisfied. I did look at PetSmart for additional oxygen stones, but they don't sell them. Not sure if those are really necessary, though. |