Great Aquariums Start Here
Live Chat Support
    Free Shipping
  • FREE Shipping ON $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
99% of items we carry qualify for FREE SHIPPING in the contiguous United States if you spend $75 or more. Learn More
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 2 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Medications  » Parasites  » Internal  »  Seachem Laboratories MetroPlex - 5 Grams
Seachem Laboratories MetroPlex - 5 Grams

Seachem Laboratories MetroPlex - 5 Grams

Average Rating 5 6
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: Seachem Laboratories MetroPlex - 5 Grams
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
In Stock: Buy now and your order will ship the next business day
This item is in stock in our East and West Coast warehouses
Item #:
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

+ Add to Wishlist
Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
FREE Shipping Promo offers FREE standard ground shipping via UPS on orders of $75 or more for orders containing non-overweight or oversize items (orders which do not qualify for our FREE shipping promotion will still be shipped at a discounted rate).

Terms and Exclusions:
  • Offer valid only on orders shipping within the contiguous United States. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam or other US Territories do not qualify for this promotion.

  • This promotion does not apply to items requiring expedited shipping, such as refrigerated products, frozen products or live rock.

  •'s FREE shipping promotion does not include products sent in oversized or particularly heavy boxes. This may include but is not limited to aquariums, canopies, chillers, external water pumps, metal halide magnetic ballasts, stands and substrate/sand. These items may be subject to additional shipping handling charges. Should shipping surcharges apply, they will be noted on individual product pages and / or displayed during check-out. We will, however, pay a portion of the shipping charges for these orders.

  • Shipping surcharges, such as special handling are NOT covered under the FREE shipping promotion.

  • Shipping charges for returned merchandise is non-refundable. Please read's Return PolicyPolicy for more information.

  • Price matched (Low Price Guarantee) or discounted orders do NOT qualify for our free shipping promotion.
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.
Shipping Cost*
Competitor's Website*
*Required information
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

Seachem Laboratories MetroPlex - 5 Grams Information

Product Manuals & Documentation

MetroPlex™ is an effective and safe treatment for several protozoan and anaerobic bacterial diseases of fish (Cryptocaryon, Hexamita, Ichthyophthirius). It does not adversely affect the filter bed and is easily removed with carbon. There is little danger of overdosing. Usual dose is 125 mg/10 gallons.

DIRECTIONS: Use 1-2 measures (included) for every 40 L (10 US gallons). Repeat every 2 days for up to 3 weeks or until symptoms disappear. Turn off UV, ozone, and chemical filtration. To feed, blend 1 measure with about 1 tablespoon of frozen food paste. To minimize loss during feeding use with Focus™. To enhance palatability use with GarlicGuard™ or Entice™. Food may be refrozen.

Active ingredients: metronidazole (70%)Inactive ingredients: excipients (30%)

* Please note Metronidazole is packaged by weight, not volume. It is normal for the container to be less than half full due to this. Depending on the duration of treatment, multiple containers may be required.

Manufacturer Info

Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

Seachem Laboratories MetroPlex - 5 Grams Reviews

Average Rating
(6 reviews)
Sort Reviews By:

Metroplex User

Reviewers Rating Excellent!

Posted: 10/14/2015 from LAS VEGAS, NV UNITED STATES
4.5 5
Experience Level: Intermediate

Comments: My marine tank had a case of Ich, so I tried Metroplex. I have another week to go with the treatments , but the fish are doing well. The Ich seems cleared up with no visible signs. I will treat an extra week just to be on the safe side, because the Ich cycle can be last about 28 days. This product does what it claims, and is not as toxic to the fish. It's definitely worth trying. Another quality product from Seachem. Thanks Marine Depot for great service.

2 of 2 People found this review helpful, did you? Yes No

Great Potent Stuff

Reviewers Rating Excellent!

Posted: 5/14/2015 from BROOMFIELD, CO UNITED STATES
5.0 5
Experience Level: Expert

Comments: This is one of the only places in US where you can find the original and actual Metroplex. It is much stronger and better, faster acting than Sulfaplex and works much better. Thanks Marine Depot for getting it to me quick and easy.

Did you find this review helpful? Yes No


Reviewers Rating Excellent!

Posted: 2/22/2015 from LOS ANGELES, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Metronidazole is the drug of choice to treat infections caused by the flagellated protozoans Amyloodinium ocellatum (velvet), Hexamita and Spironucleus. Metronidazole is also very effective for treatment of infections caused by ciliated protozoans including Cryptocaryon irritans (ich), Brooklynella hostilis (clownfish disease) and Uronema marinum, although chloroquine (an anti-malarial drug now available in some products for the aquarist) is a more effective treatment for ciliates. Metronidazole is also effective for treatment of certain anaerobic bacterial infections such as some eye infections (angelfish and butterflyfish appear to be especially prone to this type of eye infection). Because of its antibacterial actions, metronidazole may have some effect on the anaerobic bacteria of the filter bed, although this is minimal. Metronidazole is not harmful to any invertebrates and is safe for use in reef tanks.

3 of 14 People found this review helpful, did you? Yes No

great product

Reviewers Rating Excellent!

Posted: 1/20/2015 from SMYRNA, DE UNITED STATES
4.5 5
Experience Level: Intermediate

Comments: Hi this in my first review but wanted to say i bought it because had trouble with my african cichlids getting stressed an getting the bloat.I bought this product to help treat the healthy fish from getting the bloat since Afircan cichlids can be stressful with each other at times. So i been using it as a prevention rather than a cure since my fish tank is 210 gallons and thats a lot of water to treat... so what i do is get a little of aquarium water in a cup add pellets some frozen peas that I chopped up an keep in refrigerator a TINY Bit of MetroPlex an Focus and a little bit of Seachem garlic guard. The pellets soak up the medicine an the fish love it... I do this every 2 months or so as a prevention not all the time because I dont need them getting immune to the medicine .. Since using this product i have been parasite an disease free.

1 of 1 People found this review helpful, did you? Yes No

Great Product

Reviewers Rating Excellent!

Posted: 12/27/2013 from TRABUCO CANYON, CA UNITED STAT
5.0 5
Experience Level: Intermediate

Comments: I use this along with focus to internally treat my fish for ich and it works. The fish are strong, happy and ich free. I used this in my SPS Reef tank with no ill effects.

4 of 6 People found this review helpful, did you? Yes No

Healed my expensive fish !!!

Reviewers Rating Excellent!

Posted: 11/14/2012 from OKLAHOMA CITY, OK UNITED STATE
5.0 5
Experience Level: Intermediate

Comments: This product works great for internal parasites my fish were dying , had white feces , sunken bodies, and visible signs of withering away and this cured them after a week of treatment and adding it to their food now they are all happy and healthy again

23 of 24 People found this review helpful, did you? Yes No

Accessories for Seachem Laboratories MetroPlex - 5 Grams

WIN A MEDIA REACTOR! Sign up for hot deals, helpful videos, and a chance to win an Accel Aquatics FR-30 Media Reactor!