How much salt should I add

I agree, good for drdeath. Go out and purchase a 30g, they really aren't that expensive at all. It would probably cost you roughly $180 for a full setup for your puffer.
A 10g won't do in the long run, you'll need at least a 30g. These fish get BIG and if you haven't seen first hand, check out pufferpunks tank ;)
 
I did check out PuferPunks tanks - they are beautiful!

Thanks for all the information, this site has ALWAYS been helpful. I should have known better than to buy the puffer as soon as I saw it. I was at the store last Sunday and they didn't have anything exciting. I went back again on Tuesday and they had 2 puffers! I almost bought both :)

I keep seeing mention of green spotted puffers. Mine is yellow with black spots. The store identified it as a "spotted puffer". Does anyone know (without seeing pics) if this name fits the description I gave? He's about 3" long from nose to tail and they told me it was full grown.

I have tried getting pics of him but he moves too quick (or am I too slow?)

Thanks again!

DrD
 
He is likely the green (pause) spotted puffer, not named the green-spotted puffer as he/she is not. They are one of the commonest and best looking (IMHO) and most active high-personality fish. Most fols don't ever see one larger than 3" total because they keep them FW or FW with a few spoonsfull of salt. In high brackish to full SW they will get to ~6" standard (not counting tail/caudal fin).

The sure and certain ID of these is an almost-fluorescent green patch surronding the spots atop the "head" of the fish.

but you can see a decent pic of a young fish at

http://www.pufferfish.co.uk/aquaria/species/pufferfish/types/index.htm

under the listing for Tetraodon nigrifilis - even the gooid sites have confusion on names.

They are not easy to capture on film without a blur...
 
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