I just went to feed my fish and I noticed one of my gobys are not well at all. at first I thought he was dead, the bubble stone threw him up, but thats normal, but then I noticed he didn't swim away, he just started sinking back down, he landed on the leaf of a plant and just stayed there, then he slid off... I noticed his spine (is that what is it on a fish?) was bent. they all seemed fine earlier today but now he just doesn't move for a minute, tries to move a little and then stops again. hes barely hanging on to life and I don't know whats wrong with him. I'm sure its probably too late but I'm kind of worried. I was looking at the others to see if they are ok, and I don't know if I'm just seeing things or if one of the others has a slight curvature. The others are still active though. they are swimming and eating. one of them attacking the carnivore pellet as usual.
I don't know if this could possibly be the reason but.. my tank is freshwater and I was told they are brackish water fish. But the LFS had them in the freshwater section with other freshwater fish.. I figured it was like mollies, everything I have read online says they NEED some salt, but very experienced fish keepers told me that they are fine without it. so I figured it was just another mis information thing and they were really fine in freshwater.. but is that wrong? Am I killing my fish by having them in freshwater?
Btw. 10 gallon tank
it is cycled, finished last week.
have had the gobys for 1 week.
temp stays between 78-80
they are eating tropical flakes, carnivore pellets, shrimp pellets and sinking catfish wafers.
Tank mates are neon tetras and false julii cories. they get along, the gobys aren't scared of anyone, even chased a tetra away from its food, sometimes the cories "run them over" I wonder if this is an injury?
ammo 0
nitrite 0
nitrate under .30
I removed him and put him in a 1 gallon bowl I have. no filter and I didn't put in a bubble stone cause i don't want the current to throw him around. it is heated though. no light.
I don't know if this could possibly be the reason but.. my tank is freshwater and I was told they are brackish water fish. But the LFS had them in the freshwater section with other freshwater fish.. I figured it was like mollies, everything I have read online says they NEED some salt, but very experienced fish keepers told me that they are fine without it. so I figured it was just another mis information thing and they were really fine in freshwater.. but is that wrong? Am I killing my fish by having them in freshwater?
Btw. 10 gallon tank
it is cycled, finished last week.
have had the gobys for 1 week.
temp stays between 78-80
they are eating tropical flakes, carnivore pellets, shrimp pellets and sinking catfish wafers.
Tank mates are neon tetras and false julii cories. they get along, the gobys aren't scared of anyone, even chased a tetra away from its food, sometimes the cories "run them over" I wonder if this is an injury?
ammo 0
nitrite 0
nitrate under .30
I removed him and put him in a 1 gallon bowl I have. no filter and I didn't put in a bubble stone cause i don't want the current to throw him around. it is heated though. no light.
I don't really have the room to have yet another tank set up. I will have to bring them back (though stupid lfs had them in fw too) I feel terrible. I just put some table salt in. I don't have anything else. I put it in more for the purpose of helping if he is sick, not making the water brackish. gar. that is what I get for buying fish without doing the proper research first. 
