Boy or girl? Determining fish gender isn't always easy, but one species that is relatively simple to sex is the Betta. Here's how.

The aquarium is set up, but where should you put your aquairum heater? It's a simple enough question, but one that often is not published in setup instructions.

Here's what you need to know about aquarium heater placement. Not sure what size heater you need? Check the heater size guide.

Popular as far back as ancient Egypt, this member of the catfish family prefers doing the backstroke. If you are seeking an interesting, yet easy to care for fish, the Upside-Down Catfish may be a perfect choice for you.

Summer weather is here! Worried that your fish will cook in the heat? Here are ways to lower the water temperature during the hot days of summer.

Ammonia is the great silent killer of aquarium fish. Almost every fish owner has or will be faced with ammonia poisoning. Knowing how to detect it, and the steps to take to correct the problem, will allow you to avoid losing your fish.

Believe it or not, this fish is cultivated in its native country for food, where they can weigh as much as a kilo or more.

Fortunately for the Kissing Gourami, most aquarium fish lovers prefer to keep them in an aquarium instead of on the dinner table.

Many new aquarium owners make fatal mistakes because they don't know the pitfalls to avoid. Here are top mistakes made when starting a new aquarium, and how to avoid them.

No, you're not hearing things. If you own a Betta, you just might be hearing them simply playing around. Have you ever experienced this?

"My betta makes clicking sounds! Does anyone else experience this frequently or know anything about it? Morris, who passed last year used to do it not as often. But my new betta, Marcus, clicks quite frequently. This evening he clicked four times in succession and when I looked at him he clicked twice more. He was in the center of the tank so he wasn't sucking air at the top of the tank and he wasn't flicking in the gravel."

Eventually the do-it-yourself bug bites everyone. Many projects are quite easy, but before wading into the do-it-yourself waters, here are some things to consider.

Are you proud of your aquarium? Do you have special fish photos to share? Your photo could be used in the fish profile library, on the front page, or featured anywhere on this site! Here is how to submit your photo for publication.