I really like this glass aquarium. It's way better than those cheap plastic containers. This is perfect for my 2 small bettas. Setup was pretty easy and the videos posted were helpful. The fish love the cave. You can tell the filter is trying to do its job because the food you haven't eaten is sticking to it. These are pellets so they probably won't make it through the filter and I have to scoop them out. Nothing bad. I have posted a photo next to the 2 liter bottle so you can get an idea of the size. The only problem I found is the light button. It's a little finicky and may not align properly, so it doesn't click properly at times. If this continues I will contact the seller. Overall I'm very happy with it and glad I chose it.