bradmc if you can see any spots(ich) look closley for small white spots on the body,fins,even on the eyes,you should start treatment sooner the better the first time i got ich it was in my main tank,i tried paraguard and feeding with garlic for about 2 weeks wich didnt seem to help one bit and i think i overdosed it and killed my flame angle and a small puffer,so i bought a refractometer and did the hypo salinity but since it was a 130g tank it took quite a while to get the salt down low enough and i also think adding alot of fresh water was making the ph
and other parameters fluctuate alot, once it got down to 1.090 the ich cleared up quite fast and i also had huge amonia rise followed by nitrite/nitrate so i had to keep doing big water changes to deal with that,while the ich was almost cleared up big time problems with bacterial infections occured and i lost a few more fish i helped that problem with fedding alot of zoe and other vitimin additives so in the end all that lived was a snowflake eel,yellow tang and a domino damsil and both fish ended up with head and lateral line erosin problems and are now an a high vitamin c diet and doing well.
sorry for the long post.
i sold the 130g and bought 2 67g and use one for a qt
tank i got a couple new fish and added them in with the tang and damsil (long after the last ordeal) and ended up with ich again, i cought it a lot sooner this time and went and got some cupramine copper added it for 3 weeks and it cleared up right away and no side effects that i seen no stress compared to the hypo,i did have to do a couple water changes but the tank cycled quite fast compared to before.
just remember no inverts can ever go into the tank after coppering it to look into your future before making any decisions if your forced to.