You will love your fiberglass pool! I run mine with calcium of about 150. I find using the bleach, baking soda, and borax combination works best for my pool. If you have any metals, be sure to put in a sequestering agent - fiberglass pools tend to stain if there are any metals in the water. A sequestering agent will hold the metals in suspension which will avoid pool staining. Other than that you won't need anything else.