1426 Gel-Tek Penicillin Gel 2oz Aquarium Products. Medications Fish Eat. This product has not been EF tested, so the following information comes from labeling.

Gel-Tek Penicillin Gel is a broad spectrum antibiotic effective against many external infections, both gram positive and gram negative of both marine and freshwater fish.

Effective against:

Gel-Tek Penicillin Gel is labeled as safe for aquarium plants, reef tanks, and biological filters, but is not EF tested yet.
Caution: not for human consumption. For treatment of ornamental/aquarium fish only. Not for treatment of fish used for human consumption.

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