Poor water quality is the primary cause all the same. Ich comes secondary and will not strike heavily until they sense their hosts getting stressed which comes back to water quality.
Since the pleco is involved, I'd just do a teaspoon per gallon of salt for now. Be sure you DISSOLVE the salt first before adding to the tank since the grains can burn and irritate any bottom dwellers. The same applies with saltwater fish in marine tanks. If your pleco and the rest appear to tolerate it so far, you may add the second and last set in the next 12 hours. My own plecos and loaches were able to tolerate salt because of dissolution and gradual adding process.
Please keep your temperature consistently at 80 degrees and water well aerated. Do daily water changes and redose salt per water volume changed.
Since the pleco is involved, I'd just do a teaspoon per gallon of salt for now. Be sure you DISSOLVE the salt first before adding to the tank since the grains can burn and irritate any bottom dwellers. The same applies with saltwater fish in marine tanks. If your pleco and the rest appear to tolerate it so far, you may add the second and last set in the next 12 hours. My own plecos and loaches were able to tolerate salt because of dissolution and gradual adding process.
Please keep your temperature consistently at 80 degrees and water well aerated. Do daily water changes and redose salt per water volume changed.
