Seachem NeoPlex – 10 g



NeoPlex™ is a broad spectrum antibiotic effective against most external infections of both marine and freshwater fish. Used as directed, NeoPlex™ will not discolor the water or damage the filter bed. It is well tolerated by invertebrates, although delicate species may be stressed.

Active ingredients: neomycin sulfate (43%) Inactive ingredients: excipients (57%)

NeoPlex™ is appropriate for treating a variety of external infections of both marine and freshwater fish. Below are some of the more common diseases treatable with NeoPlex™. Be aware that many diseases and infections share similar physical and behavioral symptoms, e.g. clamped fins, lesions, loss of appetite.

Seachem NeoPlex is a scientifically formulated broad spectrum antibiotic medication designed to safely and effectively treat a number of potentially deadly external fungal and bacterial infections such as fin rot, bacterial lesions, bloat and mouth rot. Well suited to both freshwater and saltwater aquariums, the solution does not contribute to water discoloration nor does it damage the established filter bed. Seachem NeoPlex is completely safe for invertebrates, though some of the more delicate species may become stressed out. Comes in a 10 gram container.


Dosing in Water:

Turn off all UV filters, ozone filters, and remove chemical filtration. Use 1 measure (included) per every 8 L (2 gallons) of aquarium water. Repeat this dose every 7 days to a maximum of 3 weeks. This will treat external infections.

Dosing in Food

Feed the medicated food mix every day until the infection clears or for up to 1 week. This medicated food can be refrigerated or frozen between feedings. This will treat internal infections.

  • 1 scoop Seachem NeoPlex
  • 1 scoop Seachem Focus
  • 1 tbsp food (preferably pellets or frozen food)
  • A few drops of water if using a dry food

After Treating

When the treatment period is over, NeoPlex can easily be removed using activated filter carbon. The solution will not linger in the substrate or filter media of the tank.


  • Broad spectrum antibiotic effective against most external infections
  • Safe for marine and freshwater
  • Minimal impact on bio-filter
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