corals in trouble

[Aquattro]

Sure. You need more salt, the ocean is 1.026. Also, why are you dosing all that stuff weekly? Didy ou test for it and find it lacking? A good rule si to never dose anything you don't test for. What are the levels of your Ca, alk and Iodine? What salt do you use? What source water? How often do you do water changes and what size? Outline all your parameters and we canthen get a better idea of what might be happening.