Thank you soggycookies, but unfortunately i can only do the copper treatment at the moment as i have someone else doing the treatment for me. Due to my NS, however i will heed ur advice and try to dose 1/2 the amount recommended with 2 weeks interval (eventually hitting the full recommended dosage). Will then proceed with about 50% wc a month in, as prolonged exposure to copper could be deadly to the fishes, hopefully all pull through and no other fishes will be lost during this medication period. Thanks again! [emoji1317][emoji1317] Sent from Singapore Reef Club mobile app