My torch coral is loving the morning sun!
Gorgeous picture. I have always liked the glitter lines made by sunlight in water.
I will assume that the sulfur you are adding is to run a denitrator.
Zeolite use in reef aquaria is used to achieve ultra low nutrient levels in your aquarium. This practice was brought into the reef hobby to maximize colors in coral. In effect, you are starving zooxanthellea and the coral responds in color. Charles Delbric a noted author in the hobby, commented that corals achieved this color just before they bleached and died. It is a serious balancing act and requires work everyday.
Than you for your service. As a Vietnam vet, I welcome you back to the addiction.