Big fish tank....this needs to be my house....

This is all the more reason you should consider a tank 5 gallons or bigger for your Betta fish.
Photo provided by Flickr
This leads to the “one-day-they’re-here, next-day-they’re-gone” scenario when you look in the tank (especially the older and bigger the goldfish gets).
Yes! Goldfish do need a big tank – you should never keep goldfish in a bowl!
Photo provided by Flickr
Everyone seems to be getting along fine for the moment as they are all only about an inch long and the tetras are only about half an inch and a few mm high. I am worried though that the goldfish will eat the tetras once they get a bit bigger and that the Black Moores will find it difficult getting food fast enough. I was also told when buying the weather loach that they might gang up on the other fish if I had three or more but that two was fine. I only got one as I thought it was good to clean the tank of algae and stuff but it does seem to chase the common goldfish around and try to suck their scales, they are bigger than it so always get away after a split second. I want a big fish tank in my house made by the show tanked
Photo provided by Flickr300 Gallon Custom Fish Tank/Aquarium. I want a big fish tank like this. #fish #amazing
Photo provided by Flickr“Goldfish don’t need a big tank. They can live just fine in a cute little bowl.”
Photo provided by Flickr
You don't need to go all out here. A simple tank size of 10 - 20 gallons will suffice for most people. If you have larger fish, then obviously you want to get a bigger quarantine tank. All you really need is a bare bones setup with the following equipment:
To be completely honest.. ten gallon aquariums are not good for pet fish this size. There only a handful of species that do well in that small of a tank. Catfish are not one of them. This happens all the time and we get this question a lot. All I can say is I urge you to get your child a bigger tank and maybe indulge in the awesome hobby of fish keeping. A 30 gallon tank would be a great start.It is completely fine to have one of these in a smaller aquarium if they are in their youth of age. Must be aware though that this fish is going to need an upgrade in aquarium size as soon as it starts to grow. I personally see these fish in 20 gallon tanks all the time and I try to stress that you need a bigger aquarium. People just fail to realize that these fish need larger living environments.Watch more How to Take Care of an Aquarium videos:

When deciding on what shark to get, you want the best shark for your fish take. It first depends if you have a freshwater tank or a saltwater tank. The sharks that you'll find for freshwater tanks are not true sharks. They're not cartilaginous. They're bony fishes. Their fin patterns and their morphology closely resemble saltwater sharks, so for that reason they're called sharks, but they're not true sharks.

Saltwater is where you'd find the real sharks. For freshwater, most of the shark get very, very large. The iridescent sharks, tricolor sharks, they get really, really big, I mean, three to four feet in nature, but they happen to be very hardy. So you can keep them in a small aquarium, maybe 30 to 50 gallons in size. But they're going to quickly outgrow it, and it's cruel to keep a fish that gets three or four feet in nature restricted to a tank that's only three or four feet long. It's just really, really cruel, so I don't recommend a lot of the freshwater fish that are called sharks for home aquariums. If you have to have a freshwater fish that's called a shark, you can get a redtail shark. They don't get as big. The flying foxes kind of look like sharks. They don't get terribly large.

But for saltwater, the sharks that I would recommend are any of the cat sharks, bamboo, banded cats, dog chain. Those sharks stay on the bottom. Even the epaulettes from Australia, those are really cute sharks. They walk around on their pectoral fins. They also get large, so you want to make sure you have a large aquarium, but because they're not pelagic swimmers like black tips and white tips, any of the open swimming sharks, they're more suitable to home aquariums.

If you have to have something that looks like a great white or a baby great white, like a black tip, you're going to need a really large tank, and those tanks are very expensive. I'm talking, people would recommend a 200 to 300 gallon tank. I wouldn't put them in anything less than 1000 gallons. That tank needs to be round in shape. It needs to be eight to ten feet in diameter. They're just not going to fare well in anything smaller. And the upkeep and the maintenance on an aquarium like that is pretty staggering. You really have to know what you're doing. You need to have a lot of money or be really into this hobby to be that dedicated to keep one these open water reef sharks.

So to wrap it up, for saltwater, I would recommend one of the bottom-dwelling cat sharks. Nurse sharks are really good when they're small, but they get really large, so I don't feel that they're suitable for captivity. And then for freshwater, redtail sharks, tri-colors or balas sharks or iridescent sharks are great when they're small. But again, they're going to get really large and you're going to have to get them a much bigger tank, like the 200 to 300 gallon tank to keep them when they're adults.