Fish Pen Forte 500mg, 30 Tablets (1017038)
Fish Pen Forte 500mg, 30 Tablets is a double-strength medication with penicillin for severe infections in fish. The antibiotics in Fish Pen destroys bacteria by interfering with their ability to synthesize cell walls.
- Treats gill diseases, skin ulcerations, and other diseases common in ornamental fish
- Fish Pen Forte has double the amount of penicillin as regular Fish Pen
- Works rapidly, usually within days
- Manufacturer information and usage

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Great price, great service!
Great prodct which worked well. Easy ordering and fast shipping.
Great!
Great quality! Works like a charm. Cheap and easy to use. Couldn't be happier!
Saved my tank!
I got a few new fish and suddenly my entire tank was sick. I lost a couple but saved the rest with Fish Pen. I actually diagnosed my fish on my own and found this antibiotic online. Then I consulted the place where I got my last fish and they agreed with everything I found it. My fish were literally better in a couple of days. I am so thankful. I would have been sad to lose the fish and it would have been really expensive to replace them.