Yeah, those little 3 gallons have bubblers and tbh I don't think they are good tanks for ANY fish, since they are too small for all fish but bettas and they are too tall and narrow for a Betta. I do like the low flow on walmarts 5 gallon kits' filters, but the filters themselves suck anyways (and the cartridges are a joke. Works best if you just replace them with filter sponge). They wouldn't be all that bad if the hoods weren't cheap plastic with a stupid insert for those tiny LED strips. I had to buy a new hood for my 10 gallon and it costed more than the entire 5 gallon kits do. But walmarts 5.5 and 10 gallons are standard tanks. The kits are cheap, would be okay if you didn't ever plan on having live plants. But Petco/petsmart just have a bigger variety, better heaters/food/everything else, so going to one of them is just killing two birds with one stone. Walmart only sells tetra pellets and preset heaters and they don't have the filter sponge or silk plants... Unfortunately, walmarts all I have in town so I had to order all of my accessories online. I wish there was one place that just had everything... Besides what I've got from Walmart, I've ordered things from 6 different sources online. You don't even want to know how much I spent in total on shipping alone (especially since two orders were live fish with express shipping).