What are small red worms that constantly swim and make figure eights they approximately 14 of an inch in length seem to have taken over my pool How get rid them?

The small red worms you're observing in your pool are likely bloodworms, also known as midge fly larvae. They are common in swimming pools, especially those located near bodies of water. Here's how to get rid of them:

Chemical Treatment:

1. Shock Treatment: Use a chlorine shock treatment to raise the chlorine level in your pool to at least 10 ppm (parts per million). This high concentration of chlorine will kill the bloodworms and their eggs.

2. Continuous Chlorination: Maintain a consistent chlorine level of 2-3 ppm to prevent future bloodworm infestations.

Physical Removal:

1. Pool Vacuum: Regularly vacuum your pool to remove visible bloodworms and their debris.

2. Filter Cleaning: Clean the pool filter frequently to prevent the accumulation of bloodworm larvae.

Prevention:

1. Remove Sources: Eliminate potential breeding grounds for bloodworms, such as nearby stagnant water, vegetation, or decaying organic matter around the pool area.

2. Cover Pool: When the pool is not in use, keep it covered to prevent adult midges from laying eggs on the water's surface.

3. Skim Surface: Regularly skim the surface of the pool to remove adult midges and their eggs before they sink and hatch into larvae.

By combining chemical treatments, physical removal, and preventive measures, you can effectively get rid of bloodworms and keep your pool clean and free from these pesky pests.