I was more specifically referring to the water in our aquariums. the water in our tanks contains Cl⁻ Ions and occasionally also ammonia. I was curious if the ammonia could react with the Cl⁻ Ions to form Chloramine. I guess this is a good reason to run activated carbon and running UV. This may be one benefit noticed by reefers who employ them. forgive me if this is not possible. I’m new to the water chemistry study as I’ve obsessed about light mostly and need to bone up on my water because I’m getting ready for a new build and I’m going to master this SPS.