Mar
2026
20
How to Fix Your Green Pool this Spring
When opening your backyard swimming pool for the first time in the spring, it isn’t entirely unusual for the water to be green upon the reveal. Your pool turning green quickly typically occurs when debris and contaminants have built up over the winter, leading to phosphate levels that act as a food source for algae, accelerating its growth substantially.
If you see green water following your swimming pool opening in Pickering, you can shop pool supplies online or in-store to find the best chemicals and treatments to restore balance to your water chemistry. Or to streamline your water care, book professional pool service with the Seaway Pools & Hot Tubs team. With over 40 years of experience, our teams can turn your backyard swimming pool back into a paradise you can enjoy all year long.
Here are some tips on how to fix your green swimming pool.
Test Your Water
It’s always best to start your watercare process by testing your pool’s water chemistry. Using test strips, which you can order online or stock up on at your local pool supply store. Based on the readings, you can determine the best pool chemicals and supplies to use to balance your pool. If you prefer to get a professional opinion on how to treat your pool, you can bring a water sample to one of our two GTA locations in Markham and Newmarket, or submit a photo of your test strip online for a free water analysis from our team at Seaway Pools & Hot Tubs.
Shock Your Pool
Shocking your pool is often the fastest way to kill algae and restore clarity. Shock treatments are a popular pool supply to have on hand for pool owners because they rapidly raise chlorine levels to eliminate bacteria and organic contaminants.
A product like Fix Shock Treatment is designed specifically for situations where algae is already present, helping turn cloudy or green water clear quickly.
For a more complete solution, you can also use an all-in-one opening system like the Solution 48 Kit, which is designed to treat coloured or imbalanced water within 48 hours.
If you are unsure how to properly dose or apply treatments, either reach out to Seaway Pools & Hot Tubs for a water analysis with tailored recommendations or book your next pool service with our experienced professionals.
Brush and Treat Algae Directly
After shocking your pool, use your pool brush to break up the algae buildup on the walls and floor of your swimming pool. This allows chemicals to penetrate and work more effectively.
To fully eliminate algae, using an algaecide like Algi-Pro 40 can help kill remaining algae cells and prevent regrowth.
Run Your Filtration System
Your filtration system plays a major role in clearing your pool. Run it continuously while treating green water to remove dead algae and debris. Be sure to backwash or clean your filter regularly to maintain proper circulation. If your filters are not performing properly or effectively after your pool opening in Pickering, contact our team at Seaway Pools & Hot Tubs. In addition to regular service and maintenance, our experts can inspect your filtration system, recommend repairs, or install replacement equipment to keep your pool functioning optimally.
Keep Your Swimming Pool Clear and Swim-Ready with Seaway Pools & Hot Tubs
It’s not unusual for pool water to become unbalanced, whether you haven’t used your swimming pool in a while or you have had a high volume of swimmers. With the right pool supplies, regular testing, and support from our experts, you can effectively keep algae and green water away.
For pool opening, service, supplies, and more, contact Seaway Pools & Hot Tubs online or visit us in-store near you.
