Ihave just started with tropical fish i have 3 pirhana and im just wondein what most tropical fish like angel fish what temp should the tank be at. thanks.
Some species (eg some Corydoras) will go below the 72 mark quite happily. Pirahnas are an interesting choice for your first fish. What size tank are they in?
72 is too low IMO for most tropical fish, my coldwater tank was warmer than that at 73F. Anything from 75F-80F is considered a good middle ground but some fish like cooler (eg, cories) and some warmer (eg, discus).