NeoPlex Broad Spectrum Antibiotic by Seachem Laboratories
NeoPlex by Seachem Laboratories is a versatile broad-spectrum antibiotic designed to combat a wide range of external infections in both marine and freshwater fish. When used according to instructions, it does not affect water color or harm the filter bed. It is generally safe for invertebrates, though sensitive species might experience some stress.
Product Specifications
| Item | Detail |
|---|---|
| Brand | Seachem |
| Form | Liquid |
| Size | 0.4 oz (11.8 mL) |
| Usage | External infections in fish |
| Compatibility | Marine and freshwater fish; generally safe for invertebrates |
FAQ
Can NeoPlex be used in both marine and freshwater aquariums?
Yes, NeoPlex is designed to be effective in both marine and freshwater aquariums.
Does NeoPlex affect water color or filter media?
No, when used as directed, NeoPlex does not affect water color or harm the filter bed.
Is NeoPlex safe for invertebrates?
It is generally safe for invertebrates, though sensitive species may experience some stress.

Joan Ferguson –
Used NeoPlex to treat a bacterial infection in my freshwater community tank. The fish showed improvement within a few days. No changes in water color or filter performance. Safe for the tank environment.
Emily Hunter –
Tried it on a sick guppy. The fish recovered quickly. I noticed no negative effects on the tank’s invertebrates or water clarity. A reliable treatment option.
Max Forsyth –
Helped resolve a fungal outbreak in my marine tank. Easy to use and effective. No side effects on the filter or water chemistry.