Hi! How are your numbers looking today? How is the ph in your tank? Did you check your tap water for ammonia, nitrite & nitrate? What are you using right now as a water conditioner? Do you have an extra source of aeration in the tank besides the filter? If not, I would definitely add one or two (bubble wand, airstone, etc).
Adding some cycled media will be the quickest to speed things up. Do you know anyone with a healthy, cycled tank (friend, lfs, etc)? If your in the US, you can purchase an 'active' filter from Angelsplus (
Sponge Filters for aquariums)- they have helped many members here cycle their tanks.
Ok, salt- yes, this can help with nitrite toxicity (not ammonia) but you will need to be very careful in monitoring the exact amounts you are adding and removing with your water changes. Salt is not intended to be used longterm with goldies because it can create other health issues. Short-term it will be helpful. Use aquarium, kosher or canning salt (needs to be pure salt/NaCl with NO other ingredients). It needs to be predissolved in a container of tank water & added gradually over a 48hr period of time. I would aim for .1% salinity which equates to approximately 1 level measuring teaspoon per gallon/ 4.76grams per gallon. I would suggest using a small kitchen scale & measuring by weight rather than volume due to various different sizes of grains (ie, aq salt is large grains, canning salt is fine grains). Salt does not dissipate and only can be removed via water changes- when you do a water change, add back only the salt you remove (50%wc, add back 1/2 original dose). Make sure you always predissolve the salt in some tank water prior to adding it. Salinity needs to be increased gradually and decreased gradually so fish can have a chance to adjust to the salinity levels. Hope this helps!