How to Remove Algae From White Rocks

Small White Rocks

• 1

  Fill a colander with the white rocks.

• 2

  Flush the rocks with running water to remove algae.

• 3

  Pour the rocks into a container and fill with water.

• 4

  Scrub with an algae scraper to remove the algae.

• 5

  Rinse the rocks with clear water.

• 6

  Soak the rocks for 15 minutes in a bleach solution. Use one-fourth cup bleach to one-gallon of water.

• 7

  Rinse the container out and refill it with cold water. Pour the white aquarium rocks in and allow the rocks to soak for 15 minutes.

• 8

  Flush the rocks with clean water to wash off the bleach. Put the rocks in a colander and hold them under cold running water to remove the bleach.

Larger Rocks

• 9

  Spray the rocks with the sprayer nozzle of your hose. Sometimes this is enough to remove the algae.

• 10

  Clean the rock with a nylon brush. Dip the brush in a solution of liquid detergent and warm water. You can use a scalpel or knife to scrape away stubborn algae growth.

• 11

  Rinse the rocks off with water.