hello all i have a headlight taillight tetra that appears to have a ich nodule on its lower lip ,it started about a week ago so i started a salt treatment and rasied temp to 84 or so i appeared to be going away now this morn it looks like its getting bigger again. its about the size of a grain of salt theres one other tetra displaying the same but its smaller.should i add more salt i added about 2 teaspoons per gal. any suggestions?