[Water_Sprite]

I have a salt water aquarium that was once beautiful, thriving, and with crystal clear water. 2 months ago I was doing my regular water change. I did a little more then I should've. Since then my tank has turned into a devasting green colour. I can't see my fish. It looks like someone was making green koolaid in my tank! My salinity, Ph, nitrite, nitrate levels, and temp hasn't changed. All filters and skimmers have been cleaned and are in perfect working order. I've tried using water treatments, limiting my light, and just waiting around. I don't know what to do anymore. I've even dumped out all my water and replaced it with water from another perfectly clear salt water tank and 3 days later it's GREEEN!!!! What is it?! I've been told it's an explosion of a certain bacteria or algae. How can I fix it. It's so heartbreaking staring into a tank of green goop. I miss seeing my fish.