so i have recently been asked by my grand mother to help her setup a saltwater aquarium. it wont be anything to fancy just a 10 gallon with coral and small gobies. i decided to do metal halide lighting as i've never done it and wanted to see the effect it would have on coral and fish color. now to my question does every metal halide need a ballast, even the standard screw in base ones?
P.S to those who helped with the hydriods i moved them to a separate tank and now there making jelly fish. ya!
P.S to those who helped with the hydriods i moved them to a separate tank and now there making jelly fish. ya!


