Hi all, thanks for all your replies, unfortunately, my regal went up the lorry. Damn sad. I think my tank got some problem. Maybe not matured enough. The regal was killed by fin rot in less than 2 days despite using octozin. The other fishes, two hawks and a maroon clown are fine though.
Henry told me regals are a challange. Guess I won;t be buying anymore till I sort out my tank. Btw, I notice some white specks on the glass that seem to be alive and moving around. Anyone knows what they are?