hi all
im new to all this so please understand if i sound a bit silly,i just been given a tank with fish etc etc from my father in laws daughter (she hasnt got time for it anymore)

anyway its in my hands now

i think the tank is 37 litres (uk).my question is how many fish should be in there, ive measured the fish and the total length of the fish is 13 inches from head to base of the tail that is 4 fish total,is it time to upgrade cos i dont want them to suffer if theres not enough room for them. thanks oh yes this is a great site well done to all involved