Phero Visuals is built to run well on medium and high-end computers. Shaders still add work for your graphics card, so a few vanilla settings can help if your frame rate drops.
Check your frame rate first
Press F3 to open the debug screen. The FPS is shown in the top-left corner. Walk around a busy area, such as a forest or a village, to see your frame rate under load. Then close the screen with F3 again.
Settings to adjust
Open Options → Video Settings and try these one at a time. Recheck your FPS after each change.
1. Render Distance: Lower it a few chunks. This usually gives the biggest gain, because fewer blocks need lighting and shadows.
2. Simulation Distance: Lowering it reduces load on your processor.
3. Max Framerate / VSync: You may see screen tearing or uneven frame rates. Try turning VSync on, or set a frame cap your system can hold steadily.
4. Fullscreen: Running in fullscreen is often smoother than windowed mode.
5. Particles and Clouds: Reducing these can help in crowded scenes.
If it still struggles
You can switch shaders off from the Shader Packs menu for heavy tasks like big builds or farms. Turn them back on afterward. Closing other programs while you play also frees up resources for the pack.