A ten gallon aquarium is definitely too small for piranha. Piranha grow to about 8 inches in length, can be active and jumpey swimmers, and produce a lot of waste. All of these factors make it not suitable to keep them in anything less than a 90 gallon aquarium.
Depending on the size and age of your beardie. For a baby it can be housed in as small as a 10 gallon fish tank For an adult no less then a 40 gallon fish tank
No fish can "get along" with a piranha. Piranhas are very vicious as you know, and are NOT friendly...at all.
The tank you have described is extremely small and should not be used to house any fish. 1 gallon is not enough space for a fish to swim around, and it will most likely have a very short life if kept in this tank
length and width for a 55 gallon fish tank
Neons
That is small better stick with a goldfish.
The only fish you can keep in a 5 gallon tank is one betta (Siamese fighting fish) on it's own as that is a very small tank.
It is classed as a very small tank and could only house about 5 inches of fish. (1 goldfish is a 10 inch fish)
i have absolutely no idea. why would someone keep piranhas? no offense. they are kind of cool
No, it really isn't fair at all. Some fish can survive in a small tank like bettas but they won't be happy. Fish need approx. 1 gallon per inch of fish to thrive.
No matter what its dimensions are it is way too small to keep most fish in successfully.
guppys are tropical fish. they require a heater, and 1 gallon is to small for a heater