Hi people, i have recently started my first tropical aquarium after a reasonable amount of research. A work colleague gave me a tank, a fluval edge 23L. I was going to buy a much bigger tank but took him up on this offer and thought id use it as a trial to see if i wanted a bigger tank. Although after reading apparently this is to small for the neon tetra i have put in they seem to be doing really well and after following the advice of the aquatic center i had them from, none have died. I have 5 in the tank and was going to up this to 10 but i am now thinking maybe 8 maximum, can anyone give me any advice on how many would be suitable?