my blue line sharks

Question
Dear sir

i bought 2 Blue line sharks last Friday they are 12 inches long and healthy too but when i but them in the aquarium after 2 day white color of dusty substance appear on their body and their eyes cover with a full white cover and their jaw turn red too. now i 4 capsule of OxyTetracycline's hcl  250mg each in the water and turn my heater on water is not so hot but its better please help me in rescue my fishes

i be very thank full to  you

thanks  

Answer
Hi,
This dusty appearance sounds like ich. The red jaw is a bacterial infection. Use some aquarium salt and raise the heater a few degrees to speed up the life process of the ich. To treat the bacterial infection use some Melafix.

Hope this helps
Chloe.