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Seachem Amguard 500ml
Seachem Amguard 500ml
Seachem Amguard 500ml
Seachem Amguard 500ml
Seachem Amguard 500ml
Seachem Amguard 500ml
Seachem Amguard 500ml

Seachem Amguard 500ml

Seachem Amguard 500ml

$20.00

(317 reviews)

Seachem AmGuard Detoxifies Ammonia for up to 48 hours Ideal for emergency situations More effective than any other ammonia-binding product Most concentrated product on the market AmGuard safely, rapidly and efficiently removes toxic free ammonia. It is safe to use during tank cycling and is ideal for treating emergency situations. AmGuard is the strongest liquid ammonia binder on the market. It works within minutes to detoxify free ammonia, and it doesn’t degrade for nearly 72 hours. That’s at least twice as long as our competitors’ products. Unlike competing products, AmGuard converts it into a safe, non-toxic form that is readily removed by the tank’s biofilter. It does not alter pH. Ammonia can exist in two forms: free and ionized. It is only the free form that is toxic. Traditional ammonia test kits convert all ammonia to free ammonia by raising pH to 12–14; at this pH AmGuard cannot function and thus a false positive reading will result. Directions Use 1 capful (5 mL) for every 200 L (50 US gallons) daily or as needed to reduce ammonia.If water temperature is above 30 °C (86 °F) do not use.

Seachem AmGuard Detoxifies Ammonia for up to 48 hours Ideal for emergency situations More effective than any other ammonia-binding product Most concentrated product on the market AmGuard safely, rapidly and efficiently removes toxic free ammonia. It is safe to use during tank cycling and is ideal for treating emergency situations. AmGuard is the strongest liquid ammonia binder on the market. It works within minutes to detoxify free ammonia, and it doesn’t degrade for nearly 72 hours. That’s at least twice as long as our competitors’ products. Unlike competing products, AmGuard converts it into a safe, non-toxic form that is readily removed by the tank’s biofilter. It does not alter pH. Ammonia can exist in two forms: free and ionized. It is only the free form that is toxic. Traditional ammonia test kits convert all ammonia to free ammonia by raising pH to 12–14; at this pH AmGuard cannot function and thus a false positive reading will result. Directions Use 1 capful (5 mL) for every 200 L (50 US gallons) daily or as needed to reduce ammonia.If water temperature is above 30 °C (86 °F) do not use.

(317 reviews)

Seachem AmGuard Detoxifies Ammonia for up to 48 hours Ideal for emergency situations More effective than any other ammonia-binding product Most concentrated product on the market AmGuard safely, rapidly and efficiently removes toxic free ammonia. It is safe to use during tank cycling and is ideal for treating emergency situations. AmGuard is the strongest liquid ammonia binder on the market. It works within minutes to detoxify free ammonia, and it doesn’t degrade for nearly 72 hours. That’s at least twice as long as our competitors’ products. Unlike competing products, AmGuard converts it into a safe, non-toxic form that is readily removed by the tank’s biofilter. It does not alter pH. Ammonia can exist in two forms: free and ionized. It is only the free form that is toxic. Traditional ammonia test kits convert all ammonia to free ammonia by raising pH to 12–14; at this pH AmGuard cannot function and thus a false positive reading will result. Directions Use 1 capful (5 mL) for every 200 L (50 US gallons) daily or as needed to reduce ammonia.If water temperature is above 30 °C (86 °F) do not use.

Seachem AmGuard Detoxifies Ammonia for up to 48 hours Ideal for emergency situations More effective than any other ammonia-binding product Most concentrated product on the market AmGuard safely, rapidly and efficiently removes toxic free ammonia. It is safe to use during tank cycling and is ideal for treating emergency situations. AmGuard is the strongest liquid ammonia binder on the market. It works within minutes to detoxify free ammonia, and it doesn’t degrade for nearly 72 hours. That’s at least twice as long as our competitors’ products. Unlike competing products, AmGuard converts it into a safe, non-toxic form that is readily removed by the tank’s biofilter. It does not alter pH. Ammonia can exist in two forms: free and ionized. It is only the free form that is toxic. Traditional ammonia test kits convert all ammonia to free ammonia by raising pH to 12–14; at this pH AmGuard cannot function and thus a false positive reading will result. Directions Use 1 capful (5 mL) for every 200 L (50 US gallons) daily or as needed to reduce ammonia.If water temperature is above 30 °C (86 °F) do not use.

$20.00 - $42.50

in 16 offers

The lowest price for Seachem Amguard 500ml right now is $20.00 at aquateesfishland.com.au, compared across 15 retailers.

The all-time low was $12.95 on 23 Aug 2025 — today's price is 54% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 17 June 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 17/06/2026 20:42:27

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$37.10

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Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

aquateesfishland.com.au

$20.00

Seachem AmGuard 500ml

Oasis Aquarium

$27.00

Seachem Amguard 500 Ml

Free delivery between 22–27 June

Nature Aquariums

$27.50

Seachem Amguard 500ml

Pet Circle

$28.99

Seachem Amguard 500ml - Rapidly Removes Ammonia and Chloramines in Freshwater and Marine Aquariums

Delivery $7.95

Aquatic Supplies Australia

$29.95

Seachem AmGuard - AquaticSupplies.com.au 500ml

Delivery between 23–26 June $11.95

The Tech Den

$29.95

Seachem AmGuard 500ml | The Tech Den

Delivery $9.50

aco-aquariums.com.au

$29.95

Seachem Amguard 500ml, Help remove toxic ammonia from aquarium water

aco-aquariums.com.au

$29.95

Seachem Amguard 500ml

City Barn Malaga

$31.20

Seachem Liquid Amguard 500ML

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

Happy Fish
1 November 2017lambch0p68

originally posted on ebay.com

This is an excellent product to keep your aquarium free from harmful free ammonia. Recommend the seachem tester that sticks to the tank glass so you can monitor easily.

Review of AmGuard
13 May 2021Reviewed by Pond Planet Ltd customer

originally posted on pond-planet.co.uk

only used once, does what is supposed to do however it doesn't remove it and only binds if for certain time before releasing back into the water.

this product worked for me
26 December 2021JT

originally posted on petcircle.com.au

I personally found this product to work as it locks ammonia up to 72 hours. My city water tap ammonia reading usually is 0.50 and 0,25 NitritesI have used other water ager brands but they still showed ammonia. I also used ammonia remover zeolite from a different brand and that did not work for me either. So i switched to Seachem Amguard and no more ammoniareadings. I prefer this over Seachem Prime as it does not have any odour and it works instantly for meHowever i used a little bit over the recommended dose and i use air stone as most ammonia locking chemicals deprive oxygen in the water

Specification

Is Discontinued By ManufacturerNo
Product Dimensions19.05 x 5.59 x 3.81 cm; 521.63 Grams
Country of originUSA
Liquid volume500 Millilitres
Target speciesFish

Price comparison

Updated 8 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$37.10

Seachem Fish Tank Water Treatment (SC77309)

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

aquateesfishland.com.au

$20.00

Seachem AmGuard 500ml

Oasis Aquarium

$27.00

Seachem Amguard 500 Ml

Free delivery between 22–27 June

Nature Aquariums

$27.50

Seachem Amguard 500ml

Pet Circle

$28.99

Out of stock

Seachem Amguard 500ml - Rapidly Removes Ammonia and Chloramines in Freshwater and Marine Aquariums

Delivery $7.95

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

Happy Fish
1 November 2017

This is an excellent product to keep your aquarium free from harmful free ammonia. Recommend the seachem tester that sticks to the tank glass so you can monitor easily.

lambch0p68 originally posted on ebay.com
Review of AmGuard
13 May 2021

only used once, does what is supposed to do however it doesn't remove it and only binds if for certain time before releasing back into the water.

Reviewed by Pond Planet Ltd customer originally posted on pond-planet.co.uk
this product worked for me
26 December 2021

I personally found this product to work as it locks ammonia up to 72 hours. My city water tap ammonia reading usually is 0.50 and 0,25 NitritesI have used other water ager brands but they still showed ammonia. I also used ammonia remover zeolite from a different brand and that did not work for me either. So i switched to Seachem Amguard and no more ammoniareadings. I prefer this over Seachem Prime as it does not have any odour and it works instantly for meHowever i used a little bit over the recommended dose and i use air stone as most ammonia locking chemicals deprive oxygen in the water

JT originally posted on petcircle.com.au

Specification

Is Discontinued By ManufacturerNo
Product Dimensions19.05 x 5.59 x 3.81 cm; 521.63 Grams
Country of originUSA
Liquid volume500 Millilitres
Target speciesFish

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