Thomas Labs Fish Flex (Cephalexin) is for use in
aquariums for the treatment of bacterial activity. Cephalexin is a
cephalosporin antibiotic and acts by inhibiting the synthesis of bacterial cell
wall, leading to cell death. Cephalexin is active against both
gram-positive and gram-negative bacteria. Resistance can develop among
some gram-negative rods (e.g., E. coli).
Add one capsule (250mg) into
aquarium for each 10 gallons of water. Repeat in 24 hours. It is suggested
that a partial water change be made between treatments. While treatment
duration depends on the type and severity of infection, it is recommended
that extended baths in the medication continue for a minimum of 5 days and
for not more than 10 days. Discontinued treatment if no improvement is
noted within 5 days.