After you have gathered all of your items together, you can begin to fill your aquarium tank with water. Remember to use only fresh water. Tap water can be used, but it must be treated to remove all of the harmful chemicals before any fish can be kept. To do this, you must buy a chlorine remover. These are usually small, inexpensive bottles, and can be found in any pet store. Make sure to follow all of the instructions located on the back of the bottle to ensure a proper de-chlorination process.
After you have filled up your tank with water, it is now time to setup your aquarium equipment. Begin by setting up your Aquarium Filter. Every filter is different, so refer to the instructions which came with your aquarium filter.
Next, insert your Aquarium Heater into the aquarium tank and let it rest for about an hour. Then you can set the proper water temperature (76-83 degrees.) You can make sure that the water temperature is correct by examining your Aquarium Thermometer
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Now that you have placed your aquarium heater and made sure that the water temperature is correct, you can begin inserting your aquarium decorations inside of the aquarium tank. Remember to arrange your aquarium decorations in a way where your piranhas can easily hide. Piranhas need ample hiding spaces or you risk causing them stress. Also, make sure to follow any instructions that came with your aquarium decorations, such as rinsing or boiling, before placing them inside your aquarium tank.
After you have completed all of the steps above, it is now time to test your aquarium water’s PH levels. This can be done by purchasing a PH Test Kit , which is an inexpensive necessity. Refer to the kit’s instructions on how to conduct and analyze your water’s PH levels.
After you have finished setting up your tank, the next important process you must complete is the nitrogen tank cycling process.
you can begin the tank cycling process by purchasing a bunch of small, hearty fish. Goldfish, zebra danios, or white clouds are some good choices. All you have to do is take care of them long enoughfor the benificial bacteria to grow on your aquarium filter. Make sure to do weekly 10% water changes. After a few weeks, check your ammonia and nitrite levels. This can be done at your local pet store for a small fee or even free. If your aquarium water is found to be at acceptable levels, then congratulations, you are now ready to place your piranhas in their new home.

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I just wonder how much nitrogen cylinders would a tank use up for about a month. I’m kind of new to the aquarium hobby and I wanted to know the prices of these products. Also can I get just 1 piranha or are they supposed to be a school of piranha? Great post by the way!
Dose anyone know if I should get fake ore live plants ?
Gino … If you get only 1 piranaha could cause it to stress since it is a schooling fish …. You would probably need at least 4 to make them feal a lot more secure and ” at home ” I you will.
Hope this helped