Can someone please tell me the shelf life of this product? My 10 yr. old bottle is almost 90% full. I do see a code on it which reads "38738".

My just purchase bottle has an expiration date of 2018, so that would be 3 years. I wouldn't use 10 yr. old solution for my fish.

i dropped a half bottle of amquel plus in my 125 gal saltwater tank now a white powdery substance is everywhere i cleaned the inside of the tank with a sponge but i have a large blonde naso tang and a large koran angel both are breathing fine after 5 hours. i did a 10 gallon water change and no change in the high nitr…

I'm sorry... Can't help because your level of expertise is way above mine. But, for next time: I always add the Amquel to some water in the kitchen sink.. I never hold the bottle above the tank. Guess those chemistry classes at the University of Florida paid off!

What is the difference between Amquel and Amquel Plus?

AmQuel® PlusWater Conditioner that detoxifies ammonia, chlorine and chloraminesDetoxifies ammonia including the ammonia found in chloramineDetoxifies chlorine including the chlorine in chloramineDetoxifies all of the kinds of toxic nitrogen compounds in the waterDetoxifies all forms of ammonia/ammoniumDetoxifies all forms of nitrites/nitratesDetoxifies toxic pheromonesDoes not affect the water's pH (acidity/basicity)Does not interfere with the beneficial nitrifying bacteria or their food sourcesMade in U.S.A.AMQUEL® PLUS AS THE PREMIER AMQUEL® PRODUCTTo avoid confusion it should be recognized that there are two products with the AmQuel® name - the original AmQuel which Kordon has been providing since 1985, and the recently invented product AmQuel Plus which is based on a much improved new chemical formula. AmQuel Plus is the latest development in state-of-the-art water conditioning technology and is far beyond what the original AmQuel product does. AmQuel Plus does all that AmQuel does and a significant number of additional tasks as well. .AmQuel Plus is a remarkable new discovery that is making fresh and saltwater aquarium and pond keeping much safer and simpler. It is doing this by safely detoxifying natural nitrogen compounds in the water, including nitrites and nitrates. Thereby, the use of AmQuel Plus greatly reduces the need for continual water changes, and provides far better water conditions for fishes, aquatic invertebrates, and other life in fresh and salt water.AmQuel Plus (also referred to as AmQuel +) has the ability to make the "nitrogen cycle"totally nontoxic in aquarium and pond keeping, without interfering with the cycle's process in any way, and without interfering with the beneficial bacteria that are involved with the cycle. AmQuel Plus detoxifies all chlorine and chloramines added to the water by public water utilities and toxic nitrogen compounds that can appear in aquarium and pond water over time, thereby making water changes less necessary, and providing a safer environment for fishes and aquatic life.AmQuel Plus reduces the problems with "new tank and pond syndrome," which in great part are caused by the nitrifying bacteria in the water. AmQuel Plus makes biological filtration much safer by detoxifying its natural processes. AmQuel Plus does all this without having to be removed, once it is put into the water. It remains totally nontoxic to aquatic life.AmQuel Plus should be used for setting up aquariums or ponds, 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.Fresh water is a precious commodity and becoming in ever shorter supply. By using AmQuel Plus fewer water changes are needed in aquarium and pond keeping, thereby conserving a valuable resource. For marine aquarists AmQuel Plus greatly helps in decreasing the number of water changes needed, thereby saving on having to prepare sea salt mixes or natural sea water.

Product Dimensions	5.72 x 5.72 x 21.59 cm; 453.59 g
Item model number	MODEL-33456
Item Form	Liquid
Allergen Information	Drug-Free
Color	Clear
Number of Items	1
Quantity	1
Specific Uses	Parasites
batteries required	No
Batteries Included	No
Item Weight	453 g

Amquel Plus Water Conditioner

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