How to Identify Algae in a Pool

Algae is harmless but looks ugly in a pool. Many factors can contribute to algae in a pool, but the main ones are lack of chlorine and poor pool circulation. You also need to maintain proper pH level. Correct these problems to maintain an algae-free pool. But first, follow these steps to identify algae in a pool.

Difficulty: Easy

Instructions

1. Look at your pool and determine what type of algae you have by looking at its color. Thousands of types of algae exist, but most can be broken down into three types--blue/green, yellow and black. Decide whether to call a professional or tackle it yourself.

2. Brush the sides of your pool with a pool brush to get rid of blue/green algae. It is the easiest way to eradicate the algae, and you can remove most of it manually. If you can't get rid of it, use an algaecide formulated for blue/green algae.

3. Identify yellow algae by its pale gold or orange appearance and the fact that it doesn't cloud the water. Treat it with potassium tetraborate; be sure to follow manufacturer's directions.

4. Distinguish black algae by its color and the fact that it's the toughest to get rid of. Its roots grow deep into the pool surface and it has a hard outer shell. If you can't get rid of it with a black algaecide, you may have to replace the pool water or use an extremely strong shock that kills everything. You'll probably need professional help because the chemicals are dangerous to humans and emit fumes.

5. Consult a professional if you aren't able to kill your algae. Some contributing factors to algae growth are low chlorine level, pump not running long enough, imbalanced pH level, too much phosphate or a porous pool surface.