Hi @thetastate,
For the apple TV integration, assuming you’ve updated your ATV to TVOS 13, you’ll need to use the beta integration (via HACS) at https://github.com/postlund/hass-atv-beta
Also for reading in your pool, I can recommend getting a “Blue Connect” pool sensor. More about how I’ve integrated the data into HA here - Blue Connect pool measurements
What brand/model is your alarm system? There may be a way to integrate it. Or you replace the panel with https://konnected.io/ but keep the same sensors
Hope that helps!