Looked at their site...the part that caught my eye was this.
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. Use additional standard doses to remove greater amounts of these organic compounds. 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 (see the section in KPD-80 on "Water Quality Test Kits" under "Problems When Using Water Conditioners...").
So basically here it is saying that it will remove a certain amount of ammonia, nitrites and nitrates. However, cycling generally creates far more of these than it says the product will remove.
Sorry for your loss.
