first, let me direct you to a wonderfull fish doctor named Dr Erik Johnson.
Koivet Welcomes You
you can learn all you ever could want from this man and his associates. :)
also, i would like to confirm with you that you have elevated nitrIte, not nitrAte.
also i want to check and make sure that you possibly meant your nitrIte levels were .10?
10.0 doesnt seem right to me :P (though it could be, on rare occasions, this high)
now, assuming i am correct in your meaning, and that your nitrIte levels are high (reguardless of the number, it is still HIGH)
nitrite levels should ALWAYS be at 0. even if you get a .001 level, it is too high.
is this a new developement?
if not, chronically high nitrite levels can be a sign of over feeding.
the salt made them feel better because it blocks the effect of teh high nitrite. basically it acts as a coat, or shield for them.
if this is NOT a new thing and you ahve been dealing with hit for a while, i woudl suggest a larger tank for your babies. as over crowding is a huge issue in nitrite too.
please answer my questions :) and ask me any more questions :)