Hi again, I'm currently in the process of transferring to live plants and as such have purchased a new substrate (as well as plant fertiliser, ammonia test, new light & hardscape). I have bought a normal gravel substrate to mix with a plant substrate, more specifically Golden Tree Aqua Soil. I don't know if it contains ammonia yet or not. When replacing the substrate, do I need to cycle my tank again or will it be okay? For reference the tank has been cycled for about 3-4 months and I will be leaving the two live plants in that I currently own, but I don't have anywhere to put the fish unless I leave them in a bucket with a filter running for a night or two. No ammonia or nitrites are present.