Honestly, I don't know either of you, but I know how it is to be excited for something, and want to jump the gun and get things done before you even get something. Especially us Reefers, we hate being patient.(Especially for a new cycle) . However, we all know patience is key to success in a reef tank. So you should have used some patience before jumping the gun, although he gave you his word, he is a complete stranger, and you can't trust everyone. But on the other hand, as being a man, and coming to an agreement with another man, that's not right, regardless of the circumstances. So in my opinion you both are wrong in a way.