No action required. With a TA of 70, your pH will slowly rise on its own. Maintain a slightly negative CSI (0.0 to -0.3) to prevent scale, especially on your SWCG.
Your CH will slowly increase over the summer with fill water and evaporation. What's the CH and TA of your fill water?
Now would be a good time to increase your CYA to ~80.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!