I own two Green Spotted Puffers, named Ogre and Gir, that can't be more than 6 months old, and live together in a 10 gal tank. I'm quite honestly not sure about the parameters (I only own a hydrometer, and the sg levels are so low it doesn't even show up...I guess my fear of adding too much salt has kept me from successfully gradually turning the tank into brackish water), but as far as I can tell, they've been living in the current conditions quite well. However, the last couple of days I've been noticing that my smaller GSP, Gir, as been acting a bit strange. He's not as energetic as normal, he seems to be moving is gills more vigorously than he normally does, and I'm not sure he's eating. Since Ogre is slightly bigger, I figured he was being a pig and taking all the food (which is dried bloodworms) before Gir could eat, but I actually took the time to let Gir eat out of my fingers. Instead of sucking it up like nothing, he slowly nibbled at it, spitting out little bits. His stomach is a bit flat right now.
Could this be parasites? I did get them from Walmart, but it was months ago and they've been fine until now. I cleaned the tank up a bit about a week ago, doing a small water change and cleaning the algae. However I would think if it was something with the tank, my other GSP would be affected as well, but he's as healthy as ever.
What do you guys think? All suggestions welcomed, because even though I love them to death, I'm sure my care for these fish can be improved.
Thanks



