My new puffers are dying.

JME10

AC Members
Nov 15, 2007
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I bought two green spotted puffers a few days ago, and I admit that I knew absolutely nothing about them when I got them. Now I’ve been doing research to try to figure out what’s wrong, and I’ve learned the basics like that they need to be kept in brackish water and eat snails, brine shrimp, etc. But for right now, I’m just trying to revive them because they’re both near death and I really want to save them.

When I got them home, I put them into two separate freshwater tanks, one with other fish and one alone. Both tanks were a little bit dirty, because I didn’t realize at the time how particularly sensitive GSP’s are (but both of them have now been cleaned by changing 50% of the water). The first thing I noticed was that neither of them would eat. I tried feeding them frozen bloodworms and brine shrimp, but they showed no interest in food. After three days (today), I assumed that the reason they weren’t eating was because they needed to be in brackish water to be comfortable. One of them was still swimming around slowly, but the other was laying on the bottom of the tank without moving. All I had available for them as a new home was a 1-gallon tank, which I know is too small, but I decided to set it up temporarily for them with brackish water. I bought a hydrometer and added marine salt to try to raise the specific gravity by the recommended 0.002, but the hydrometer wouldn’t take readings that small. I did a little more research and found a website that recommended adding 1 tablespoon of salt for every gallon, so I got the filter running and then added the tablespoon. When I put the fish in, both of them turned belly-up and floated to the top of the tank. They were doing poorly before, but this was the worst I’d seen them. I quickly put them both back into the same tank--the tank in which one of them had at least been swimming before--but they don’t seem to be getting any better. One is still floating belly-up at the surface, and the other is sitting in a plant without moving.

Is there anything I can do for them? I feel so guilty for all that I’ve put them through. I really want them to make it. Please let me know if you have any ideas for how I can save them.
 
when you got them at the store, were they being kept in brackish water or fw? Are they still in the 1gal tank? If they were being kept in fw, they might be too far gone to save. I would get at least a 10gal tank, set it up, and get ready to do water changes like mad, since you're basically going to end up doing a fishy cycle.
 
I'm going to go back to the store tomorrow to find out more information about how that tank was set up, but I'm pretty sure it was a freshwater tank. They're not in the 1-gallon tank anymore, I put them back in a bigger freshwater tank. Right now I'm learning how to do a fishy cycle, so I'll do that tomorrow too. Is it because of the brackish water that they're so sick, or because the tanks weren't clean enough? One of them has been swimming around a little, but he's bumping into walls, which he was doing even before I put them into the brackish tank. The other is still floating upside down at the top, and he has a big bump on his abdomen. Do you think it's too late for them?
 
I dunno, but the health issues are probably a combination of both. Store tanks are often way overstocked and not as clean as they should be. A brackish fish living in fw will have all sorts of problems, a weakened immune system being one of them, so the combination could well be fatal. Keeping them in a tank, with the lights off, in a stress free environment is probably the best thing you can do for them. Slowly start adding salt, keep a CLOSE eye on the water params, particularly ammonia and nitrite, and maybe boost the temp up to about 78-80 or so.
 
Do you have any pictures of them? The bump might be air. GSP's do better in a salinity of 1.010 and later on they need full marine water. i started my brackish tank at 1.010 and now my salinity is 1.020. When you add salt to the tank make sure it is marine salt,not freshwater salt. Puffers need pristine water conditions to thrive.
 
One of them died last night unfortunately, but the other is still drifting around bumping into things. I went back to the store today and the woman there told me to keep him in freshwater until he’s feeling better, because she said they were conditioned to live in freshwater at the store so that’s what he’s used to. She tested the water from my tank and the ammonia and nitrite levels are good, but the pH is high, so she recommended changing the charcoal in my filter and putting in some water conditioner. So that’s what I’m going to do right now. Does that sound logical?
 
They're brackish fish, its not going to start feeling better until its in brackish water. Continue raising the SG by about .002 per day. How high was the pH? The elements and compounds in marine salt will tend to raise the pH..its most likely not an issue. Running charcoal wouldnt' do much to change the pH anyway, although right now its probably not a bad idea. Are you using city water? If so, you should be using water conditioner anyway to dechlorinate.
 
I don't know what the exact pH level was, but she said it was quite high. I didn't put any marine salt into this particular tank though, so that can't be the reason why it's high. It could have something to do with the water I refilled the tank halfway with because it came from our well and went through the water softener. If I'm going to try raising the SG again, I'll have to put him back into the 1 gallon tank because there are other fish in the tank he's in right now, and I don't have any extra money (or time, today) to go buy another one and set it up. The 1 gallon tank also doesn't have a very good filter because it's so small. Should I still put him back in it, just to raise the SG?
 
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