Question: Quick aquarium size question

[Nioa]

I'm planning on getting some danube crested newts in the future and I just want to be sure on how many could live comfortably in a 20 gallon aquarium. Are four of them suitable?

 

[joemomma1016]

A lot of people say 5 gallons per newt, so I think that'd be alright. If you could spring for it, a 29g would be great too. There are some $1 per gallon sales at Petco and Pet Supplies Plus sometimes too.