NovAqua+, Amquel+, and Prime

NovAqua+ does the same thing but different formulation, it doesn't have that strong sulfur smell the other two have. I've tried all three and prefer NovAqua+ for my discus tank cause they seem to prefer it. A gallon jug of it lasts me a long time.
 
Yes Novaqua+ is different. Prime is more concentrated as a dechlorinator and will make nitrogenous compounds non-toxic. But Novaqua+ supposedly has aloe vera and vitamins in it.
 
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Ive only tried prime...
 
I only use Prime, but if it weren't available I'd go with Amquel +.
 
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