Seachem Pond Prime Water Conditioner – Chemical Remover and Detoxifier 2 L

I have used Pond Prime in the past but the current online vendor I use [WWG] does not carry it. Pond Prime has the advantage of “neutralizing” ammonia as well as removing the chlorine and chloramine from tap water. I get ammonia spikes when my koi spawn so I looked online for another source for Pond Prime so I could use a single product to condition the water rather than getting a second one to deal with the ammonia issue. Went with lowest price vendor and when the product arrived it was missing the front label. Uh oh! Is it counterfeit? Anyone who has ever used Pond Prime would immediately recognize the smell: VERY strong sulfur aroma. This definitely had that and it seemed to work – chlorine level stayed at zero after a partial water change and the ammonia went from over 2ppm to .5ppm in 3 days [test reagents measured ALL ammonia, both NH3 and NH4 ].Still, the missing label concerns me and I will be contacting the vendor to see what’s up.