Hi
I take it this tank has not been setup long?? My guess would be you're getting an ammonia or nitrite spike.
Sounds like poisoning which causes them to become inactive due to poor oxygen exchage.
Was going to suggest a test but if you have no other tank it won't do any good. Increase aeration or ciculation
and donot feed until they become active again.
Don't disturb them ,will only cause an incresed oxygen demand and compound the problem.
If you have a good water supply do a patial water change
be sure to use dechloinater. No more than ten percent and equal temp.Skip the salt you want bacteria now lol.
Good luck Goldfish are tough they may surpise you!!
gary

Thank you for the response. Actually the tanks been up for a long time that is why I'm concerned. I've done all the ammonia checks yes it was high after the initial water change so I added the amminolock the recommended number of times and they still sit on the bottom (all other levels pH, Nitrate are fine) What else could it be? I'm really fearing that haveing to be gone for a week will have me come home to a very unhappy surprise :( Anything else I can check?

It's possible that it could be swim bladder disease.

Here is a link that might be useful: Swim Bladder Disease

I came across this when looking for a cleaner for my turtle tank. Maybe it'll tell you what's wrong with your fish. The most important parts are the problem descriptions and the causes. The products listed are only from one company, but other companies probably have similar products.

Here is a link that might be useful: Green Bay Aquarium Society Tropical Fish Problem Solver Chart

Do you have pebbles in the tank? My ping pong pearlscale was lying on the bottom of the tank, gasping for air. Took him to the Animal Clinic of Morris Plains, NJ to see Dr. Paul. Turns out he had swallowed a rock! They took an X-ray, did surgery, and pulled it out. (Photos available on the Animal Clinic's Facebook page) Now Cali is as good as new! Please take your fish to a vet who can take an X-ray. No one believed that my little guy was capable of swallowing a pebble so big, but it happens! No more pebbles in my tank now.
http://www.animalclinicofmorrisplains.com/
https://www.facebook.com/AnimalClinicofMorrisPlains