Thomas Labs Fish Pen (Penicillin) exerts a
bactericidal action on gram-positive and some gram-negative bacteria. Penicillin
is a broad spectrum antibiotic. It is effective against a number of pathogenic
bacteria associated with ornamental fish diseases. Can use for pop-eyes,
infected eyes, fin or tail rot, gill disease, columnaris disease, and skin
Dosage & Administration
Add one tablet (250 mg) into aquarium for each 10 gallons of water to be
treated. Repeat in 24 hours. It is suggested that a partial water change be made
between treatments. While duration of treatment depends on type and severity of
the infection, it is recommended that extended baths in the medication continue
for a minimum of 5 days & for not more than 10 days. Discontinue treatment with
this medication if no improvement is noted within 5 days.
Keep out of reach of children. For aquarium use only. Intended for ornamental
fish and/or ornamental organisms, and not intended for use with fish for human
consumption. For those allergic to penicillin, do not put hand in tank for three
days after treatment.
Store at controlled room temperature of 59°-86°F.