TM Bio-Actif. It is Pro reef but with their Reef-Actif mixed in. Which is a seaweed based mild carbon dosing. I do like it. The good and the bad of it is you have to use it right away (24hrs) to get the most out of it. It keeps you from putting off your water change once you mix it.Curious what salt mix are you using?
But heres the kicker... 30% of my water change water is NSW mixed in. My temperate tank is 100% NSW for water changes. Previously I used Brightwell Neomarine which I was happy with, which I might go back to if the cost of Tariffs, affect TM too much.

