Leopard Pufferfish?? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 17 Old 08-09-2008, 03:35 PM
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You measure the SG with something called a hydrometer. It basically just tests how floaty the water is (ya know how you float easier at the beach than in a pool?). Most marine hydrometers start at an SG of .12 or something though, so you'll need a special one that measures lower levels of salinity.

Salt doesn't evaporate, so you only need to add salt for the amount you've *removed* in a water change. For instance, if you have a 10 gallon tank, and over a week, 1/2 gallon has evaporated. Then you start a water change and remove another 3 gallons. This means that to fill the tank back up you'll add 3 1/2 gallons. However, you only need to add salt to make 3 gallons salty, as there salt from the 1/2 gallon that evaporated is still in the tank.

This is one of the trickier parts of keeping salt water, and can be a mistake a lot of people make at first, which kills their fish :(
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post #12 of 17 Old 08-09-2008, 03:38 PM
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I think salmon are a little different, since they are born in entirely fresh water far inland, then move out to the open ocean later in life. I could be wrong, but I think puffers tend to spend their whole lives in what could be called "brackish" water, but move to saltier and saltier areas as they grow.

You can use a hydrometer to measure the salinity of your water. Refractometers are more accurate but also more expensive.

For a green spotted puffer, you would want to match the salinity of your tank to the tank at the store you're buying your fish from. Otherwise, the fish could suffer osmotic shock and die. Then, every other water change or so, you'd want to add a little bit more salt to your new water than the previous measure to slowly build up the salinity of your water to the desired amount for a full-grown fish. It sounds complicated but it's actually not too tough, since the salt doesn't ever disappear from your aquarium except by water changes. For example, as long as you keep your tank topped off with additions of fresh water to make up for evaporation (where no salt is lost), you could remove a gallon of water with a specific gravity of 1.005 and replace it with a gallon with a specific gravity of 1.006. This would very slowly and safely increase the salt level of your tank. (Of course, I haven't exactly worked out the math here, so depending on stuff like the size of your tank and how fast your fish is growing, you would add salt more slowly or faster than this.)

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post #13 of 17 Old 08-09-2008, 03:49 PM
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I think salmon are a little different, since they are born in entirely fresh water far inland, then move out to the open ocean later in life. I could be wrong, but I think puffers tend to spend their whole lives in what could be called "brackish" water, but move to saltier and saltier areas as they grow.
I believe you're right. I was just kinda oversimplifying. But the same basic concept of migration applies, just not so extreme. I do believe that GSP's need basically fully marine water when they grow up though.

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Refractometers are more accurate but also more expensive.
Interestingly enough, I've heard that refractometers aren't that much more accurate, and since they need to be calibrated, they can actually more more inaccurate at times.

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For a green spotted puffer, you would want to match the salinity of your tank to the tank at the store you're buying your fish from. Otherwise, the fish could suffer osmotic shock and die.
Luckily that'll probably be pretty easy, as the store's keeping them in freshwater! Also, only raise the SG by 0.002 a week, more than that or the bacteria will die off from the rapid change in parameters.
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post #14 of 17 Old 08-10-2008, 08:07 AM Thread Starter
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okay!
thanks so so much for all your help guys!!!
:D <3

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post #15 of 17 Old 08-10-2008, 02:43 PM
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No prob :D

Just for the record, I actually saw them today at Petco for sale as "leopard pufferfish", and they were GSP's. I assume you saw them at a Petco as well. Such cute little guys! My BF was wishing I could get them, since they look way less evil than the C. Lorteti I have.
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post #16 of 17 Old 08-11-2008, 07:35 AM Thread Starter
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haha yeah! thats where i saw them. and my friend and i were liek "omg. they're soooo cute!!! and i neeed one!"
but i figured before i get one i should really learn about them so i dont kil the poor thing, so i can decide if i actually have the means to make it happy

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post #17 of 17 Old 08-30-2008, 01:09 AM
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Originally Posted by tmz
haha yeah! thats where i saw them. and my friend and i were liek "omg. they're soooo cute!!! and i neeed one!"
but i figured before i get one i should really learn about them so i dont kil the poor thing, so i can decide if i actually have the means to make it happy
good job :3 but as for advice even if you cant put the whole fully marine aquarium salt thing atleast some salt is better than none but again introduce it slowly ;D i myself found myself buying a poor lil specimen from walmart i couldnt help it it looked soo helpless but it seems healthier in my tank XD so for now iam happy
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