Definately not in the plural form. A 10 gal tank in use only holds around 8 gals or so. 1 Piranha would be over maximum capacity.. The basic rules are. 1 inch of fish needs at least 1 gallon of water (a Piranha is about a 10 inch fish) Every tank must have a permanently running cycled filter. Every tank needs at least 50% of its water replaced every week.
if they are babies... if they are adults they need a 20 gallon tank. you will need to give them more height then floor space
YES
You can put 3 mice in a 10 gallon tank. It is best to not put 4 mice because the ventilation will not be enough and will smell horrible and possibly cause distress to the mice.
Yes but a big enough tank so about 10-15 gallon tank so the all are separate from each other
Danios or glofish would be a good fish to put in the tank. They are schooling fish which means you would need at least three and I wouldn't put more than 5 in a ten gallon tank.
You can but it is cruel and it wont live very long.
20
you mean in a ten gallon tank? yes, then, if it is a stable tank, and there is a male and a female, then it is possible. that has happened to my 10 gal. before.
The fish are not bad together. But way to many fish for a ten gallon tank. You put one fish for every gallon. They will probly do fine but you will have to clean more.
Yes that is big enough but you will need a lid so it doesnt escape
I would suggest upgrading to a 10 gallon tank.
you can, but its risky. i dont recomend it. maybe try one and see how it does before you put both in