Thomas Labs Thomas Labs Fish Pen Forte (Penicillin)
Thomas Labs [11442-585679]

Thomas Labs Fish Pen Forte (Penicillin)

FREE shipping on orders $49+

Thomas Labs' Fish Pen Forte packs twice the punch of regular Fish Pen. Using dosed penicillin, Fish Pen Forte combats bacterial infections common in aquarium fish.

  • Twice the concentration of regular Fish Pen
  • Kills gram positive and some gram negative bacteria
  • Controls common bacterial fish diseases including fin & tail rot and flexibacter infections


Fish Pen Forte is useful in controlling a number of common fish infections, including pop-eyes, infected eyes, fin & tail rot, gill disease, columnaris disease, skin ulcerations and other bacterial infections in ornamental fish.

Directions: Add one tablet (500 mg) into aquarium for each 20 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.

Ingredients: Penicillin (500mg per tablet).

Allergy Information: If you are allergic to penicillin, do not put your hand in the tank for three days after treatment.

Note: For aquarium and ornamental fish only. Not for human use. Keep out of the reach of children. Keep container tightly closed and in a cool dry place. Not to be given to fish intended for food use.

Price:$33.15 to $126.00
0 Reviews - Submit a review

Questions? Call us Mon-Thurs: 8am-5pm, Fri: 8am-2pm Pacific Time: 1-888-373-8686

Best Price Guarantee: Find a lower price, call us.
Same Day Shipping: Order by 12pm PT Mon-Fri.
Free Shipping: On all orders over $49+

Enter quantity below and click add to cart.

Color & Quantity
Item

$33.15
$62.99
Save 47%
60 Tablets
Status:In Stock
Model:00-12131.T2
UPC:725068017035
Sku: TL01703
Id: 585899

$126.00
$21.00 per month*
Spread payments over six months by selecting “PayPal Checkout” on the Shopping Cart page. Then log in and select “PayPal Credit” to apply.
$252.99
Save 50%
BULK - 240 Tablets - (4 x 60 Tablets)
Status:In Stock
Model:01703M
UPC:688713101827
Sku: TL01703M
Id: 589235

We Also Suggest

Thomas Labs Thomas Labs Fish Mox Forte (Amoxicillin)
Price: $14.79 to $93.00
Compare: $26.99 to $186.99
Save up to $93 (50%)
API API MelaFix Antibacterial Fish Remedy
Price: $5.99 to $181.00
Compare: $10.99 to $362.99
Save up to $181 (50%)
Hikari Hikari Betta Revive Fish Health Aid
Price: $1.79 to $21.48
Compare: $2.99 to $40.99
Save up to $19 (48%)
Mardel Mardel Maracyn Plus Antibacterial Aquarium Medication - Liquid
Price: $10.19 to $611.96
Compare: $18.99 to $1,958.99
Save up to $1,347 (69%)
Seachem Seachem MetroPlex Parasite & Bacteria Treatment
Price: $6.28 to $37.68
Compare: $10.99 to $71.99
Save up to $34 (48%)
Save 20% today!
Enter your email + enjoy
20% OFF
20% off max discount $5