StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Seachem
Seachem
Seachem SulfaPlex

Seachem SulfaPlex

4.8(5 ratings)

Best price now

$9.99at Blue Fish AquariumChecked 1 h ago

77% under what the other stores charge

Compared across 12 stores. Prices are checked against each store and labelled with when.

Visit Blue Fish Aquarium

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

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
    Visit ASAP Aquarium
  • SaltwaterAquarium.comNew

    In stock

    $43.74Free shippingChecked 1 h ago
    Visit SaltwaterAquarium.com
  • Fish Tanks DirectNew

    In stock

    $43.74Checked 1 h ago
    Visit Fish Tanks Direct
  • Blue Fish AquariumNew

    Availability unknown

    $9.99Checked 1 h ago
    Visit Blue Fish Aquarium
  • West Lake AquaticsNew

    Availability unknown

    $10.99Checked 1 h ago
    Visit West Lake Aquatics
  • Tropic CoveNew

    Availability unknown

    $12.99Checked 1 h ago
    Visit Tropic Cove
  • YoCamron's ExoticsNew

    Availability unknown

    $38.99Checked 1 h ago
    Visit YoCamron's Exotics
  • DynamicTankNew

    Availability unknown

    $42.98Checked 1 h ago
    Visit DynamicTank
  • Squeaky's AquaticsNew

    Availability unknown

    $44.62Checked 1 h ago
    Visit Squeaky's Aquatics
  • eBayNew

    Availability unknownSold by marineandreef1998

    $44.82Checked 1 h ago
    Visit eBay
  • marineandreef.comNew

    Availability unknown

    $45.52Checked 1 h ago
    Visit marineandreef.com
  • filtermediadirect.comNew

    Availability unknown

    $48.99Checked 1 h ago
    Visit filtermediadirect.com

Also available at

  • AmazonCheck price at Amazon
  • Rons CichlidsCheck price at Rons Cichlids

Store links may earn us a commission.

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.

More from Seachem

  • S
    Seachem KanaPlex
    Seachem KanaPlex
  • S
    Seachem Stability Fish Tank Stabilizer - for Freshwater and Marine Aquariums 2L / 67.6 oz & Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 2 L
    Seachem Stability Fish Tank Stabilizer - for Freshwater and Marine Aquariums 2L / 67.6 oz & Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 2 L
  • S
    Seachem Stability New Tank Stabilizing System
    Seachem Stability New Tank Stabilizing System
  • S
    Seachem Aquarium Polisher
    Seachem Aquarium Polisher
  • S
    Seachem Stability Fish Tank Stabilizer
    Seachem Stability Fish Tank Stabilizer
  • S
    Seachem Pond Stability
    Seachem Pond Stability
  • S
    Seachem Laboratories Betta Basics Biological Conditioner
    Seachem Laboratories Betta Basics Biological Conditioner
  • S
    Seachem Fresh and Saltwater Conditioner
    Seachem Fresh and Saltwater Conditioner
All Seachem deals and products →

More aquarium medications

  • S
    Seachem Paraguard
    Seachem Paraguard
  • S
    Seachem Reef Dip
    Seachem Reef Dip