Seachem Paraguard 250ml (SC-606)


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Eradicates ectoparasites and fungal, bacterial, and viral lesions. Safe for fish and bio filters.

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$ 20.20

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Brand: Seachem

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Seachem Paraguard 250ml (SC-606)

Treats Fish Disease

Seachem ParaGuard is a fish medication effective against fish fungal infections, fin rot, velvet, white spot, flukes on gills and body. Fishes heal as fast as within 7 days. *

* The suggested treatment period varies according to the type of disease. Please refer to table below.

Safe Medication for Fish

Seachem ParaGuard works as a fish medication that eliminates ectoparasites, fungal, bacterial and viral lesions, all of which affect the development of fish.

It is safe for fish and bio filters, and does not pose any danger to your aquarium as compared to traditional methods of dosing formaldehyde, formalin, and methanol.

Suggested Treatment Period

ParaGuard is effectively for treating the following diseases:

DiseaseSuggested Treatment Period
Ich (White Spot)14 days in freshwater, up to 28 days in saltwater
Velvet14-21 days
Fin Rot7 days or until infection clears
Flukes (Gill and Body)14 days or until infection clears


ParaGuard is the only fish and filter safe aldehyde based (10% by weight) parasite control product available (for parasites on fish). Unlike highly toxic and difficult to use formalin based medications, ParaGuard contains no formaldehyde or methanol and will not alter pH.

ParaGuard employs a proprietary, synergistic blend of aldehydes, malachite green, and fish protective polymers that effectively and efficiently eradicates many ectoparasites (e.g. ich, etc.) and external fungal/bacterial/viral lesions (e.g., fin rot).

It is particularly useful in hospital and receiving tanks for new fish and whenever new fish are introduced to a community tank.


Remove all invertebrates from the tank as well as any chemical filtration. Use 5 mL (1 capful) of ParaGuard for every 40 L (10 US gallons). Repeat this dose daily as required as long as fish show no stress.

ParaGuard can also be used as a medicated dip. For 1 hour dips, use 3 mL per 4 L (1 US gallon) in a container separate from your main tank. Dips may be extended if the fish show no evidence of stress. Keep in mind that many diseases linger in the water as well as on the fish. Giving a fish a dip treatment does no good if they go right back into infected water.


This is a tank set up in order monitor and medicate new fish before they go into the main tank. ParaGuard is gentle enough to use prophylactically (without visible symptoms) if needed. Quarantine times vary, but we generally recommend 2 weeks of treatment with ParaGuard to clear out any possible external infections.

Sensitive Fish

Some fish are more sensitive to medications than others. Eels, loaches, rays, sharks, and many others are well known for their sensitivity to all kinds of medications. If you suspect that your fish may be sensitive to medications, it is just fine to start with a partial dose and build up to the full dose over several days.

Not recommended for reef aquaria. As an alternative, use Seachem MetroPlex.


1. Is ParaGuard safe for use in marine reef tanks with invertebrates and soft corals?

Answer: We do not sell or market ParaGuard as invert safe because it would be impossible to test it with every available invert under every potential water parameter. We have had people use it with invertebrates with no problems, but we have also had people encounter problems. If you decide to use it we stress caution; dose at 1/4 to 1/2 dose and observe how your inverts and soft corals react. If they seem to tolerate the dosing, increase slowly up to no more than the prescribed dose as long as they are tolerating it. If you need to get rid of the ParaGuard quickly, just turn your skimmer back on.

2. Is there copper in ParaGuard?

Answer: No, there is no copper in ParaGuard

3. Is it safe to use ParaGuard in planted aquarium? Can my plants survive?

Answer: We do not sell or market ParaGuard as invert/plant safe because it would be impossible to test it with every available invert/plant under every potential water parameter. It has been my personal experience that it is generally safe to use in planted aquaria and would not hesitate to do so.

4. Do I need to remove Purigen from my filter while medicating with ParaGuard?

Answer: While the primary active ingredient in ParaGuard is unaffected by the presence of Purigen, the malachite green does have potential to be removed by the media. Since the product is most effective when both of these components are present to perform synergistically, we do recommend that the Purigen (as well as any other chemical filtration media) be removed while treating. If removal of waste is of primary concern in the treatment tank, then Purigen may be left in place, but the medication will not be as effective.

5. Is ParaGuard safe for Loaches or scaleless fish?

Answer: You can use any of our medications with scaleless fish, but as they can be more sensitive, we would recommend that you begin with a 1/4 to 1/2 dose first and slowly build to the recommended dosage.

Seachem Fish Treatment Products

N30 is the authorised dealer in Singapore for Seachem medication and fish treatment products.

Order your Seachem medication and fish treatment products online today at

Seachem Guide

Which Seachem products do I need?

From treating fish infections to solving water and algae problems, Seachem has the right products to restore your aquarium.

Seachem - Fish Disease Treatment

A sick fish can spread infection quickly within an aquarium and threaten the life of other aquatic inhabitants. It is critical to accurately diagnose fish disease and dose the right medications as early as possible.

common fish diseases symptom guide - seachem medication guide

Seachem - Solve Aquarium Problems

Sometimes, a small change in water chemistry, alkalinity and acidity could cause problem for the aquarium. Below are some of the common problems:

  • Cloudy water
  • Algae over growing
  • Ammonia, nitrite, nitrate toxicity
  • Detritus or slime

Is your aquarium facing any of the above issues? If yes, use this guide to find the right Seachem products to restore your aquarium.

seachem products for common aquarium problems

About Expiration of Seachem Products

Many Seachem products do not have an expiration date by virtue of the ingredients used to make the products. Many mineral and non-organic components are shelf-stable, and do not have a finite shelf-life, and may be used for years with continued efficacy. If a product does not have a printed date of expiration, it can safely be assumed that the product does not expire.

expiration date of seachem products

About N30

About N30 Tank

N30 Tank Pte. Ltd. is a leading manufacturer of custom-made fish tanks cabinets. As a tank maker, we supply aquarium cabinets to homes and offices locally as well as ship orders worldwide.

N30 provides expertise in the construction of large acrylic aquariums, such as those in Underwater World (Resort World Sentosa). We supply customised storage tanks to fish farms such as Qian Hu, and to major restaurants. The N30 brand name is trusted for quality workmanship in the industry.

N30 has developed unique glass-sealing techniques, which allows us to produce very large tanks (such as 30-feet long) without issue of water leakage. For all custom-made fish tanks, N30 assures customers of Five Years Warranty against water leakage.

To support the needs of aquarium hobbyists, N30 is also offering a wide range of aquarium accessories such as filters, pumps, lighting, wave makers, skimmers... for sale online. We encourage customers to browse and shop online at for accessories. It is convenient and we provide free delivery for orders (see the online store terms and conditions for details).

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Loyalty Points (N30 Member Rewards)

Earn 5 points per dollar

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Convert points into eVouchers redeemable for discounts on your orders.

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When you purchase S$100 of aquarium accessories online at, you will earn 500 points in your N30 account. You may convert the 500 points into an eVoucher worth S$5. To use this eVoucher on your next order, simply enter the unique eVoucher code in your shopping cart before you check out. That's all!

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