Swimming Pool & Spa Construction & Maintenance/Greenish pool.


I have a 24 x 48 pool, approximately 15000 gallons. I had issues last year with clarity and never really cleared it up. I leave the water level over the winter at below the skimmer. When I opened it a couple of weeks ago, I topped it off with water, vacuumed the bottom and sides and added algaecide, two bags of shock and let it run. It still had a greenish color. My Alkalinity and Ph is in its correct level and it looks like the chlorine is correct. It might be a hair low. I just added more algaecide earlier today. I read tonight that algaecide wont work by itself. Im just looking for some suggestions. Thank you.

Hi Robert,

Sorry to take so long getting back to you... 'tis the season!

My first recommendation to you would be to REALLY shock the pool. 2 bags just aren't going to cut it. I would go with 8 - 10 bags at one shot. You don't want to play with algae; you want to dispose of it.

Also, be sure to run the filter continually without backwashing until it clears.

Here's some further information for you:


I hope that helps! Let me know.

Swimming Pool & Spa Construction & Maintenance

All Answers

Answers by Expert:

Ask Experts


Ron Parrs


Swimming Pool & Spa/Hot tub care. Water chemistry. Problem solving. Residential pools, vinyl liner a specialty. Limited knowledge of gunite or plaster pool construction. Familiar with almost all types of sanitizing systems whether chlorine, bromine, salt, low & non-chlorine chemical treatment, biguanide (Baquacil or Soft Swim), Nature2, etc. Experience treating bio films in pools and spas. Aqua finesse, PoolNaturally & SpaNaturally (using sphagnum moss to control pool & hot tub chemistry & bio-films).


Pool & spa care experience for over 37 years. Owner of Par Pool & Spa in Stratford, CT. Websites: www.parpools.com , www.spacareonline.com , www.pool-care.net , www.parpoolsblog.com

EzineArticles.com , websites mentioned above, Pool & Spa News

BS Accounting, University of Bridgeport, almost yearly participation in BioGuard Pool Schools, BioGuard University, Chem Plus Schools, Chem College attendance since 1981

Awards and Honors
Past President - Connecticut Spa & Pool Association, Past Board Member - Northeast Spa & Pool Association

Past/Present Clients
too many to answer

©2017 About.com. All rights reserved.