I bought an 8 gallon tank from Petsmart. Its a nice size. Fits my Danio's, but I have two complaints. 1) Is my fish get stuck behind the plastic backing that houses about 2 gallons of water. Not sure why this was made like this. I had to make a contraption out of a small container with some string attached, to lower into the back part of this tank and then once the fish swim inside, I am able to quickly pull up the container with the fish and dump them back into the main tank area. This is crazy! 2) I cannot find replacement filters for this tank. Why is this? Can someone explain? this? User's recommendation: Do not buy from this brand.