correct, but chloramine doesn't break down immediately on contact with conditioner either. Why take the chance, if it takes 30 minutes to neutralize, then thats 30 minutes its been killing your filters. if you have perfectly healthy strong fish, a little spike in ammonia and nitrite while the bacteria regrows won't hurt them, but he.doesn't have a perfectly healthy tank on his hands Just my opinion, guess everyone should do what works for them.severum mama said:You won't want to use Epsom salt IMO but Kosher salt works fine. It doesn't have to be "aquarium salt".
FWIW I have been dosing my tanks with Prime and adding the makeup water back in immediately for going on 8 years now. Tap water is not going to nuke a tank's bio filter on contact.