- Reaction score
- More than 10 years
GM, I’ve had GSP’s for years. IMO He is a green spotted puffer. He will get bigger-6 inches. He’s brackish water, so try to get bigger tank, 20 gallon if you can, buy instant ocean salt, hydrometer & gradually add salt to his water. GSP babies are freshwater, then swim to salt water as adults. He will soon no longer be able to breathe in freshwater once he’s adult. Puffers need immaculate warm water conditions, so water change at least 50% once or twice a week, clean out filter floss monthly. Also if he’s belly turns black, he’s sick. He at top because he probably needs air, no salt in the water.
Marine salt will kill your freshwater fish, give him his own tank, you can add mollies, bumblebee gobys, etc.