Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
There are several strains of Ich. Sounds like Planted Rich may have had the strain called Super Ich: It does not respond to most Ich meds, and takes longer to cure.
Quick Cure does not work so fast.
When the Ich organisms are burrowed in under the slime coat no meds can kill them. They must mature, fall to the bottom and reproduce.
Medicines kill the babies, so they do not re-infest the fish.
When you are no longer seeing new spots on the fish that means the medicine is working, by killing the baby Ich before they get on the fish.
Keep up the treatment until all the spots have fallen off and had a chance to reproduce so that you are killing those last baby Ich.
A much lower level of salt can help the fish. Fish are under stress when they are sick, and salt can help. A very low level may not be enough to kill Ich, though.
When the Ich is gone, quit adding salt. Allow the level to come down gradually through regular water changes.