I have a single Green spotted puffer in a 20g. tank. He is by himself and always has been. He is now about two inches long and seems very happy but I cant help but think he is lonely...I have had Puffers in small groups before with not too many problems but never on their own...Does anyone have experience keeping them on their own? Were they happy? Is it too late to add other puffers to the tank? Please let me know what you think...
Thanks
I always keep puffers on their own, at least not with other puffers. The one exception I will make to my rule is with Dwarf puffers because of their size. There is a high chance of aggression between puffers that can result in the death of one or both of your fish. As long as you keep your water well maintained and keep the puffer fed properly it should be quite happy on it's own!
The one suggestion I'd make is to start saving for a larger tank for the GSP, they will grow to nearly 6 inches. This may take some time to happen but your fish will seem more happy in a larger tank, I'd reccomend at least 40 US gallons. Also give the fish a bubble wand to play in, they love those!
Good Luck
SLC