
Seachem SulfaPlex
Best price now
77% under what the other stores charge
Compared across 12 stores. Prices are checked against each store and labelled with when.
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Price facts
- Lowest price today: $9.99 at Blue Fish Aquarium (checked Nov 12, 2026).
- Checked at 12 stores.
Seachem SulfaPlex prices at every store
- ASAP AquariumNew
In stock
$11.99Free shippingChecked 1 h ago - SaltwaterAquarium.comNew
In stock
$43.74Free shippingChecked 1 h ago - Fish Tanks DirectNew
In stock
$43.74Checked 1 h ago - Blue Fish AquariumNew
Availability unknown
$9.99Checked 1 h ago - West Lake AquaticsNew
Availability unknown
$10.99Checked 1 h ago - Tropic CoveNew
Availability unknown
$12.99Checked 1 h ago - YoCamron's ExoticsNew
Availability unknown
$38.99Checked 1 h ago - DynamicTankNew
Availability unknown
$42.98Checked 1 h ago - Squeaky's AquaticsNew
Availability unknown
$44.62Checked 1 h ago - eBayNew
Availability unknownSold by marineandreef1998
$44.82Checked 1 h ago - marineandreef.comNew
Availability unknown
$45.52Checked 1 h ago - filtermediadirect.comNew
Availability unknown
$48.99Checked 1 h ago
Also available at
- AmazonCheck price at Amazon
- Rons CichlidsCheck price at Rons Cichlids
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Seachem SulfaPlex price history
Lowest price we've seen: $9.55 on Nov 12 at Amazon. Tracked across 13 stores since Nov 12.
About the Seachem SulfaPlex
Treats many bacterial, fungal, and protozoan infestations
Broad spectrum antibiotic and anti-fungal medication
Most effective of the sulfa drugs in saltwater
Absorbed through gills
SulfaPlex™ is an effective and safe treatment for many bacterial, fungal and protozoan infestations in the aquarium. While it can be used in both freshwater and saltwater, it is particularly effective against the common bacterial and fungal infections of freshwater fish. It is also among the gentler antibiotics, and great for treating fish that are already stressed. It is easily removed with carbon and does not impair nitrification.
Active ingredients: sulfathiazole (69%) Inactive ingredients: excipients (31%)
SulfaPlex™ is appropriate for treating a variety of bacterial, fungal and protozoan infestations. Below are some of the more common diseases treatable with SulfaPlex™. Be aware that many diseases and infections share similar physical and behavioral symptoms, e.g. clamped fins, lesions, loss of appetite. Fin Rot, Hemorrhagic Septicemia, Fur Coat Syndrome, Mouth Rot, Fungus.
Dosing in Water
Remove all invertebrates - these are extremely sensitive to medication. Turn off UV filters, ozone filters, and remove chemical filtration like MatrixCarbon™ and Purigen®. Use 2-3 measures (included) per every every 40 L (10 US gallons). Repeat this dose every 72 hours for a maximum of 3 weeks.
Dosing in Food
SulfaPlex™ is most effective when used in the water, but it can also be added to the food. Feed the medicated food mix (recipe below) every day until the infection clears or up to 3 weeks.
1 scoop SulfaPlex™
1 scoop Focus™
1 tbsp food (preferably pellets or frozen food)
A few drops of water if using a dry food
To enhance palatability use with GarlicGuard™ or Entice™.
After Treating
When the treatment period is over, SulfaPlex™ can easily be removed using activated filter carbon like MatrixCarbon™. It does not linger in the substrate or filter media of the tank.
Aquarium Use Only. Keep Away from Children. For ornamental fish only. Not for human consumption. Not to be used in conjunction with animals used for human consumption.
Questions and answers
- Where is the Seachem SulfaPlex cheapest?
- At Blue Fish Aquarium, for $9.99, 77% under what the other stores charge, as of our latest check.
- What do buyers say about the Seachem SulfaPlex?
- Rated 4.8 out of 5 from 5 ratings.
- Where can I buy the Seachem SulfaPlex?
- 14 stores we checked sell it, including Blue Fish Aquarium, West Lake Aquatics, ASAP Aquarium, Tropic Cove, YoCamron's Exotics.









