another ich and salt thread

It will take awhile to clear out all the ick by raise temp and salt, I would add "Nox Ich" for 3 days then do some water change and treat it again if ich and white spot still present, depend on your flow rate your UV might able to kill parasites also vacuum your gravel if you have it.
*NO OFFENSE HERE* In general most folks failed about flow rate vs UV light, they thought added a UV light and their tank will be free of parasites

UV will kill the floaties, but does nothing to the ick that's stuck on decor/plants or resting on the substrate--I usually get flamed for this, but I am a huge believer in copper treatments. Since you have a catfish the dosage would have to be extremely small, but in my experience low dose copper is much more effective than high dose salt/heat & it treats a much broader spectrum of health issues. Salt is extremely painful to catfish. Please do not try salt WITH copper though, change your water until the salt is gone, then start copper at low dose & the ick will be gone in about a week. If not, change water again & add another small dose of copper. Lower doseage for more time is the idea with copper, as it doesn't take much to do the job, you just have to keep it going long enough for all the dormant ick pods to open so you can have "killer" in the water throughout it's life cycle.

If I were you and I still saw fish flashing I would try treating with ParaGuard for a few days. Effective safe med.

Any Malachite Green (turning water green) based medication works a lot faster and more effective than salt and heat treatment. Many people still advocate salt and heat treatment in the myth that salt and heat is safe, and MG is harsh. You want to use a remedy that is harsh to the pathogens, but not the hosts, and if you follow the instruction, MG is perfectly safe. Salt and heat is unsafe because it works too slowly to eliminate ick before the disease is cured, and ick often returns after treatment because it hasn't been wiped out. Also, some fish are sensitive to and cannot tolerate high heat and salinity. When I used MG, I feel safe that if I follow the instruction, ick will be wiped out in a few days because MG is harsh to the pathogens.

Yes, catfish/loachs are sensitive to MG/FORM. The recommended dose is half strength. If they responded to heat/salt, I would increase salinity and try that. Malachite Green stains blue by the way.