Hi There, I have only recently taken up the hobby of setting up an aquarium, and have 4 fancy goldfish in a 220lt tank. I have had it fully functioning for around 2 months now monitoring water temp etc to ensure I'm doing the best I can, however over the last week I have noticed that one fish in particular is rubbing up against the other fish, swimming right up behind the other (basically its head is inside the others tail) what looks to be nibbling, although I haven't noticed any injuries from it. Does this mean he wants to breed perhaps? It is summer in South Africa and the water temp is consistently at 28'C if this has any effect at all.
