I found it in my local garden shop in B.C, srry not garden shop but its actually a nursery and they had and also another place that sod pet food and tools and stuff also carried it put it wasnt cheap one was about $15 and at the other store $12 so ya.
Ordered autumn 2011, strangely I did not have any problems and received the shipment. Maybe I am lucky.
I believe the "ban" is more of a restriction than anything else; as long as you purchase under a certain amount, you are fine, but if you purchase larger quantities, the government will ask for identification so that they will have it on record.
Seachem's aquavitro N source uses exclusively urea and ammonium nitrate. So I have to assume it's not too bad.
Hmm, looking at the Seachem website for this product:
Approximately 50% of the nitrogen in synthesis™ is derived from an organic source (urea), while the remaining nitrogen splits at about 25% each from nitrate and ammoniacal sources.
This dose increases total nitrogen by 0.24 mg/L. This is the same amount of nitrogen that would be present if all nitrogen were present in the nitrate form at 1 mg/L. Because not all nitrogen is in the nitrate form, you will measure a 0.25 mg/L nitrate increase immediately after dosing.
Of this amount, 0.12 mg/L is urea, while 0.06 mg/L is from other ammoniacal sources. Urea slowly hydrolyzes into ammonia, so we can assume there will be 0.24 mg/L of ammonia from the urea, and adding this to 0.06 mg/L of other ammoniacal sources, we get a total of 0.30 mg/L of ammonia.
Essentially, you are adding 0.3 ppm of ammonia to your water each time you are dosing. Now, whether the plants and/or beneficial bacteria would absorb/break this down faster than it could harm livestock is another question.