Kordon Amquel Plus +® Additive - 16oz

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  • AmQuel Plus is nontoxic
  • AmQuel Plus removes nitrite.
  • AmQuel Plus removes all forms of ammonia.
  • AmQuel Plus removes nitrite.
  • AmQuel Plus removes nitrate.
  • AmQuel Plus does not affect the pH.
  • AmQuel Plus does not interfere with the beneficial nitrifying bacteria or their food sources.
  • 1oz bottle - treats 60 gallons
Use AmQuel+ for water changes, overcrowded aquariums and ponds, the control of toxic nitrogen compounds commonly found in water while the nitrogen cycle is established., as well as afterwards as nitrogen compounds accumulate in the aquarium and pond water.

To avoid confusion it should be recognized that there are two products with the Amquel name - the original AmQuel and the recently improved product AmQuel+. AmQuel+ does all that AmQuel does and a significant number of additional tasks as well.

AmQuel+ is the latest development in state-of-the-art water conditioning technology and is the next step beyond what the original AmQuel product does.
  1. Its purpose in treating tap water when water is added or water changes are made is to detoxify chlorine and chloramines and its components (chlorine and ammonia) and to make the water safe for aquatic life free of these lethal toxins.
  2. A primary purpose in aquariums and ponds is to protect aquarium and pond fishes and invertebrates by quickly eliminating (actually detoxifying) the harmful components of the biological nitrogen cycle - ammonia, nitrites, and nitrates without slowing the nitrogen cycle or interfering with the beneficial bacteria involved, or depriving these bacteria of their food.
  3. Also, in overcrowded aquariums and ponds where waste products from the fishes, etc., quickly collect, it can rapidly detoxify toxic organics.
  4. Another purpose is to detoxify organic compounds that accumulate in the aquarium and pond water over time, including noxious pheromones released by fish and aquatic invertebrates to signal and repel each other. This is specially important for reducing the frequency of needed water changes. Many larger freshwater and saltwater aquarium fishes release pheromones to establish territoriality and repel other fishes. This is particularly true in fresh water for cichlids and plectognath fishes (triggers, filefish, puffers, boxfish) in salt water.
Among AmQuel+ benefits are that it is easy to use and equally effective in fresh and salt water, and it does not affect the beneficial bacteria of the biological nitrogen cycle. AmQuel+ is compatible with all water conditioners and all Kordon medications and other medications on which it has been tested, and with all aquatic life - including live rock and reef tank inhabitants. Other benefits are that AmQuel+ does not affect pH (acidity and alkalinity), and does not discolor the water. AmQuel+ has a long indefinite shelf life expected to be many years.

Note: Amquel+ has an acerbic odor, but does not affect aquatic life, and the odor quickly disappears in use.

AmQuel+ is similar in its actions, but with a different formula, and will be described in greater detail when the patents pending are approved.

Patents are pending for the formula and it is not available until the patents are approved.

For control of chlorine alone in public water supplies (e.g, tap water) add one teaspoon (5 ml) per 100 gallons of fresh or salt water to remove in excess of what is in public water supplies (public water supplies have less than 3 ppm chlorine).

For all other purposes use measurements in proportion to a "Standard Dose" of AmQuel+, which is one teaspoon (5 ml) per 10 gallons of fresh or salt water, or one liquid ounce (25 ml) per 60 gallons of water, or one cup (8 liquid ounces = 200 ml) per 480 gallons of water, or one pint (16 liquid ounces = 400 ml) per 960 gallons of water. For other measurements estimate the amounts needed, such as 1/4 teaspoon for 2.5 gallons of water, etc.

To remove chloramines (chlorine and ammonia combined) out of the tap from public water supplies add one Standard Dose (see definition above) to the water to break the bond between the chlorine and ammonia, to remove all the chlorine, and to remove all ammonia that may be in public water supplies. Only one dose is needed for removing all chloramines and their components from public water supplies.

To control the toxic organic nitrogenous compounds of ammonia, nitrite, and nitrate and other toxic organics that build up in aquariums and ponds from the excretion of body wastes by fishes, invertebrates, bacteria and other aquatic organisms start with a Standard Dose (see definition above). This Standard Dose will remove (detoxify) at least 1.2 mg/L (= approx.1,2 ppm) of all ammonia compounds, at least 2.0 mg/L (=2.0 ppm) of nitrites, and at least 13 mg/L (=13 ppm) of nitrates. We recommend only one standard dose per 24 hour period. The removal of these compounds will happen within five minutes, or slightly longer for ammonia at a higher pH above 7.5. It is important to understand that the amounts of organic compounds removed may vary with differing water conditions. The amounts indicated above are the minimums that AmQuel will detoxify, and what is removed may be up to several times higher. Use accurate test kits to check how much of each compound is being removed when using multiple doses. Be aware that test strips may be insufficient to provide accurate readings; check liquid and powder reagents to be sure that they are not out-of-date.

So far as is known for this new formulation, AmQuel+ is stable indefinitely when stored in a cool, dark area away from heat and direct sunlight. Amquel+ should be kept tightly closed when not in use.

AmQuel+ is harmless to plants, fishes, invertebrates, and other aquatic life forms. This product is safe for use in aquariums and ponds and will not interfere with biological filtration or its bacteria. When AmQuel+ detoxifies ammonia, nitrite, nitrate and other organic compounds, it breaks the links of molecules apart. The bacteria do not know the difference and eat the parts, just as they would the whole original compounds. AmQuel+ may affect the dyes in certain types of cotton fabrics. This happens for the same reason that Ammonia test kits using the Nessler reagents do not work with AmQuel or AmQuel+. These products reduce the coloring agents used in the Nessler reaction test kits, and apparently in a very small selection of cotton based fabrics.

AmQuel+ should not be added to water containing active, therapeutic dosages of chemical dyes such as methylene blue, acriflavine, malachite green, and potassium permanganate, since AmQuel+ will interfere with their proper performance. Combining Amquel+ with these dyes will not result in toxic chemical by-products. AmQuel+ can be useful in those instances when it is desirable to terminate a treatment with a chemical dye. This is particularly useful with potassium permanganate because Amquel+ (and AmQuel) removes the coloring in the water instantly.

AmQuel+ is compatible to use with all water quality test kits except for the ammonia test kit that uses Nessler reagents that read in shades of amber or yellow, and the oxygen test kit that uses Winkler reagents. Residual AmQuel+ and its reaction products are incompatible with the Nessler-and Winkler type reagents, resulting in false, high ammonia and low oxygen concentration readings. Ammonia test kits using salicylate-type reagents are appropriate for accurate test results. Any oxygen test kit other than those using Winkler`s method is compatible with AmQuel+.

Amquel+ is non-toxic when used as directed. Many hundreds of kinds of freshwater and marine fishes, aquatic invertebrates and plants have been exposed to multiple full doses of Amquel during extended test periods and general use with no toxic effects. Amquel+ does not reach toxic levels even in cases of accidental or purposeful overdosing. AmQuel+ is non-toxic to humans and no special precautions are necessary in handling this product.

As a general rule, when using tap water in which chlorine and chloramines are present, but not nitrites, nitrates or other organics -- then it is safe to use the less expensive AmQuel. If there is the possibility of nitrites, nitrates and other organics being involved, then Amquel+ is recommended.

Add AmQuel+ to the water at the recommended dosages as described above. Since AmQuel+ rapidly spreads through the water, no special agitation is needed. When new water is added, usually Amquel+ should be used with Kordon`s NovAqua. It is recommended that both be used to fully condition new water, such as out of the tap from public water suppliers.

AmQuel or AmQuel+ and NovAqua should be added to tap water used for short-term shipping fish and invertebrates. For long-term shipping of more than one day AmQuel+ should be used with NovAqua, because of the build up of toxic organics from excretion. If the fish are crowded or prone to bump into or abrade each other, PolyAqua should be added as well to both the shipping water and the aquarium or holding tank after shipments are received. NovAqua and AmQuel, when used together, will reduce stress, osmotic and pH shock, probability of infection, and neutralize ammonia, chloramines, chlorine and heavy metals. When Amquel+ is used with NovAqua it increases the protection by neutralizing nitrites, nitrates, and other organics. PolyAqua should be used to handle abrasions, bruises, and frayed fins of fishes.

When using water from natural conditions for field collecting, the use of AmQuel or Amquel+ in holding and shipping water will reduce stress in fishes and invertebrates due to ammonia intoxication. If fish will be held for days in containers, AmQuel+ should be used, because it will remove (detoxify) nitrites and nitrates as well. In addition, PolyAqua should be used in holding and shipping water for optimum protection against abrasions, bruises, and frayed fins in fishes.

Product Manuals & Documentation

Kordon Amquel Plus +® Additive - 16oz

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Kordon LLC
Kordon has been supplying aquarists and pond keepers with the products they need since the 1960`s. They are dedicated to developing the right products along with the right documentation to back up those products. All Kordon aquarium products are carefully researched and tested prior to their release. Quality control is constantly maintained in their production and distribution.



Experience Level: Intermediate

Kordon Amquel Plus

Great product. It removes nitrite, nitrates , and ammonia. The best thing about this product is it can be added directly to your aquarium. It saves on water changes. I LOVE IT!!!

2 out of 2 found this review helpful

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Experience Level: Intermediate


I used this as instructed to do a weekly 10% water change on my saltwater reef... Within 5 minutes ALL of my coral SHUT down completely. My xenia's grasped themselves shut. Zoa's were open/close sporadically. Toadstool polyps where gone for 2 days. Mushrooms all shrivelled up!! I WOULD NOT SAY THIS IS REEF safe as the product describes. I had no issues in my planted tank but I thought I had lost hundreds of dollars in coral ! :( After about 4 days and daily 20% water changes the corals mostly restored themselves minus some mushrooms which never returned. Im sure it is good for some tanks but I wouldn't think of using it in salt water

3 out of 3 found this review helpful

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Experience Level: Intermediate

Great Additive

A must have for ponds and over stocked aquariums. Has saved my fish several times, because it is a great band-aid for postponing emergency water changes till after work.

1 out of 1 found this review helpful

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Experience Level: Intermediate

Works Great!

Novalek/Kordon customer support told me that it has binding properties that can help remove dye stains. The water did in fact look clearer, but I'm not sure if it was from Amquel Plus or from the water change. My fish seemed fine with it. The bottle says that it removes ammonia & nitrite which is good for overstocked tanks(which I have) or tanks where ammonia and nitrite spikes occur often. If your tanks water parameters are usually stable, I'd recommend Seachem's Prime which only detoxifies ammonia & nitrite (rather than removing it). Ammonia & nitrite are necessary for the beneficial bacteria in your filter.

5 out of 7 found this review helpful

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Experience Level: Intermediate

discus raisers arsenal

this is a must have supplement don't raise discus without it

4 out of 4 found this review helpful

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