How to Get Rid of Algae on the Bottom of Your Pool

Algae on the bottom of a pool can make swimming less enjoyable and complicate maintenance. This guide walks through a practical, practical approach using common tools and safe methods to restore a clear, inviting pool. The focus is on effective scraping, brushing, and suction to dislodge and remove algae buildup without damaging pool surfaces.

Quick Answer

Use a combination of brushing, scrubbing, and suction to remove bottom algae. Start with a thorough debris removal, then scrub with an algae brush, and finish with vacuuming using a pool vacuum head designed for algae removal. For stubborn spots, a pumice stone can help on concrete surfaces, followed by a final brush and vacuum.

What You’ll Need

Telescoping Pool Pole Algae Brush Bottom Cleaning
Pool Vacuum Head for Algae Removal Bottom of Pool
Pumice Stone for Concrete Pool Algae Removal
Algae Scraper for Pool Bottom
Pool Cleaning Kit with Algae Brush and Scrubbing Pad

	ATIE 5-Inch Heavy Duty Stainless Steel Bristle Wire Pool Algae Corner Brush for Concrete and Plaster Pool Spa to Brush Hard-to-Reach Pool Corners, Steps, Tiles
	Pool-Whiz Pumice Block, Pool Tile & Concrete Cleaner, Pumice Stone for Cleaning Pools, Spas & Water Features, Pool & Spa Cleaner, Pumice Block for Rust, Stains Build Up by Billy Buckskin Co. Pack of 1
	U.S. Pool Supply Weighted Transparent Triangular Pool Vacuum Head with Swivel Hose Connection and EZ Clip Handle – Connect 1-1/4″ or 1-1/2″ Hose – Removes Debris, Clean Corners – Safe for Vinyl Pools

Before You Start

Prepare the area by clearing leaves and debris from the pool surface. Inspect the pool floor for rough patches or delicate finishes that could be scratched by aggressive brushing. Always wear eye protection and use gloves. Check the pool’s chemical balance—pH and sanitizer levels should be slightly adjusted before deep cleaning. Time estimate: 1–3 hours depending on algae severity. Important: DO NOT use metal implements on vinyl liners or delicate plaster without testing a small area first.

Step-By-Step: How To Remove Bottom Algae

Position the telescoping pool pole with the algae brush at the bottom area with visible algae growth.
Brush in overlapping passes to dislodge algae, focusing on corners and low-traffic zones where growth tends to persist.
Switch to the algae scraper for stubborn edges and scale buildup; apply steady, controlled pressure to lift the algae from the surface.
Run the pool vacuum head along the bottom, keeping the hose submerged to avoid air pockets and to maximize suction.
For concrete surfaces, lightly use a pumice stone on small, non-delicate patches. Rinse frequently to prevent over-scratching.
Re-brush the cleaned areas to release any remaining spores, then vacuum again to remove loosened debris.
Check the filter and run the system through a complete cycle to clear dislodged algae from the water column.
Test water chemistry and adjust chlorine or other sanitizers as needed to maintain clear water post-cleaning.
Monitor the bottom for a few days and repeat brushing and vacuuming if new algae spots appear.
Clean and store tools properly after use to prevent cross-contamination to other areas of the pool.
Consider scheduling regular brushing sessions to prevent future bottom algae buildup.

Troubleshooting

Symptom	Likely Cause	Fix	Prevention
Algae returns quickly after cleaning	Insufficient circulation or poor sanitizer levels	Adjust chlorine or sanitizer, increase filtration time	Regular brushing and scheduled cleanings
Algae at corners or steps	Poor water flow or shaded areas	Improve circulation, consider a booster flow or aeration	Rebalance chemistry and monitor light exposure
Scratching on plaster or vinyl	Overly aggressive scrubbing or pumice use	Switch to softer brushes, avoid excessive pumice pressure	Use appropriate tools for surface type
Cloudy water after cleaning	Dislodged debris and high organic load	Run the filter longer, backwash or clean the cartridge	Maintain proper filtration and routine cleaning
Stubborn patches resistant to scrubbing	Stain or mineral buildup	Use a specialized stain remover if compatible with surface	Address mineral levels and circulation

Common Mistakes

Using metal tools on vinyl liners or plaster
Brushing too aggressively and scratching surfaces
Turning off circulation during brushing and vacuuming
Skipping water chemistry checks after cleaning

Tips For Best Results

Maintain a consistent cleaning schedule, especially during warm months when algae growth accelerates. Use a dedicated algae brush and scraper to minimize contaminating other tools. Ensure the pool vacuum and filter are functioning properly, and pause vigorous brushing if the water becomes overly cloudy. Regularly check pump and filter seals for leaks, and backwash or clean filters as recommended by the manufacturer.

Call A Professional

Consider a professional if algae rapidly returns after cleaning, persistent staining remains, or if pool surfaces show signs of damage or chemical imbalance that are difficult to correct. Stop and contact a pro if there is significant algae bloom, structural concerns, or if a professional-grade treatment is needed beyond routine brushing and vacuuming.

FAQ

What is the fastest way to remove algae from the pool bottom?

Brush, scrub, and vacuum in sequence, while maintaining proper chemical balance to prevent regrowth.

Can pumice stone damage my pool?

Yes, if used too aggressively or on delicate surfaces; use light pressure and test a small area first.

How often should I brush the pool bottom?

Depends on conditions, but regular brushing every 1–2 weeks during active seasons helps prevent buildup.

Do I need to shock the pool after removing algae?

Shocking is often beneficial after a major algae cleanup to restore sanitizer levels and prevent regrowth.

Is a robotic cleaner better for algae removal?

Robotic cleaners can help with continuous debris removal, but a manual scrub and vacuum are typically needed for thorough bottom algae removal.

Buying Guide

Choosing the right tools for bottom algae removal involves considering pool type, surface, and typical usage. A telescoping pole combined with an algae brush provides reach and control for brushing the deepest areas. A dedicated pool vacuum head designed for algae removal ensures strong suction and efficient debris pickup. For concrete pools with stubborn patches, a pumice stone can help, but it must be used carefully on rough surfaces. A complete pool cleaning kit with an algae brush and scrubbing pad offers convenience and consistency in maintenance. Always verify compatibility with your pool surface to avoid damage.

Buying Factors To Consider

Size and reach: Choose a telescoping pole length that accommodates your pool depth and layout. Noise level and energy use are less relevant for manual cleaning, but an efficient vacuum head reduces run time. Controls should be simple and reliable, with interchangeable heads for different surfaces. Placement matters: store tools in a dry area away from sunlight to prolong life. Compare kits that include multiple tools to cover brushing, scrubbing, and suction in one package, and verify that the included brushes are soft enough for vinyl liners but effective on algae.