If the Kanaplex by itself doesn't help after treating for 10-14 days, consider either the "trifecta" of Kanaplex + Furan2 + Metro or NFG or Sulfaplex + Neoplex.I've been fighting with HLLE too with my yellow tang.. her fins are growing back really well but unfortunately she have a wounds that looks like bacteria near her bottom fin and I'm treating her with kenaplex.. it's been really tough for her but she's my miracle fish..