Very informative Wilder, Thank you!,
I would like to add some extra info at this time. As said before I had added three black Swordies to my tank and the male died in less than 18 hours no signs of sickness or injury, about 36 hours later I noticed a few white dots on my orange male they were in a nearly straight line so I thought it may have been a scratch. I then noticed, 24 hours later, one of the females had white dots on her tail and back fin. Before the addition of these three Black Swords the last addition of new fish was January 14th, 3 Yoyo loaches. I have re-introduced a few Swordtail juveniles(about two months ago) and all of the original Swords(the parent fish) have died. I have never seen any signs of ich before.
Today I did a 40% water change with gravel vac. Scrubbed all the major decor in hot water and cleaned the filter in part of the change water. I raised the temp from 79F-81F and added the meds as instructed(1ml-100l). The med is called fauna mor which contains:
2.5mg tetramethyl-thionine chloride,
1.0mg tetramethyl-4,4-diamino-triphenyl-carbinole,
0.5mg hexamethyl-parrosaniline chloride,
0.3mg arciflavine chloride/ml
I also removed another neon that was developing a bent spine and added a teaspoon of pure mediterrainian sea salt (no anti-clumping or other additives).
I have not been adding salt to this tank because of the Yoyo loaches, but the grow-out tank gets a regular dose of salt and the juvies are doing well and there are a hell of a lot less pest snails in that tank!