So I have a fairly new saltwater tank about a year and I start to notice that every time I clean the bottom of the tank when doing a water change I still keep getting green algae on the bottom and on the rocks. I'm stuck between two products that I have I need to make sure that one it would not kill everything in my fish tank and which one is better. I have everything you could think about that somebody would have in a saltwater tank I have an emerald crab I have to 2 clown fishes I have soft coral. Pistol shrimp and I do have Turbo snails. Below I will have two product with a picture just please let me know which one is better to use and what you had a better result with.