The Above Ground Pool...More Like A Pond

by Lucas S
(Canada, Southern Ontario)

I recently moved into a new home.

The former owners left their 18' above ground pool. It hasn't been used in a couple of seasons and they never put a winter cover on it.

It's just like a pond.

What would be the best way to clean the pool?

Should I drain it and clean it and fill it back up with water or just hook everything up and dump a large amount of chlorine in it?

I just wanna know the best way to do it and the quickest way to do it.

Thank you in advance.

Thanks for the question Lucas

I will assume that when you say your pool is now a pond, the water level is down, the water is green and thick with algae, and the walls and floor are covered with black and green slime.

If this is the case, and you don't have a huge investment in the pool already, I would suggest you drain and clean it.

You can do a very light acid wash, normally a 4:1 ratio. 4 parts water and 1 acid.

You'll probably need to scrub a bit to loosen any slime that's adhering to the floor and walls.

Rinse very well and drain that out the best you can. You can use a power washer, BUT, do this at a far enough range that it won't affect the liner.

A wide spray would be best.

Or use a garden hose with an adjustable nozzle.

If you simply rinse it off with your thumb on the hose, you're going to have alot of excess water.

You can go to this page for all the links to chlorine, pH, alkalinity, and calcium hardness. They will show you what to do and how to do it.

Swimming Pool Chemistry

I would suggest getting a Taylor FAS-DPD K-2006 pool test kit. It's the one most pool professionals use and will give you the most accurate readings:

Water Testing Kit

Pool Water Testing

Be sure you test your fill water with your kit. This way you'll know what going into your pool and you can make the right adjustments. There's no guessing involved.

You might be able to get pool water delivered to you. This is already balanced out and it should be ready to go.

Pool Water Delivery

The question didn't mention what kind of filtration you have, but this site has all three kinds of filters, maintenance, and troubleshooting.

Be sure to check out the pool Q&A page. There's lots of great information there as well:

Swimming Pool Questions and Answers

Hope this helps and good luck with your pool.


Click here to post comments

Return to Above Ground Swimming Pools.

New Pool...What To Do With Chemicals

Just got a new 9x16 above ground pool. It's filled with water and I have no idea what to do about chemicals. Where to start how much to add if you need to shock it right away to start out?

We bought 3 inch chlorine tabs and a one of the things to put them in and float them. What else do we need to start swimming?

Thanks for the question

First, I'll direct your attention to these posts about starting up a new pool:

My First Pool..How Do I Add Chemicals & Make Adjustments?

Above Ground Pool..Need To Know About Chemicals & What To Do..

Installing Chemicals In The Proper Place

The above posts have links to the chemical pages that you need, namely chlorine, pH, alkalinity, and hardness. They tell what to do and how to do it.

I'd encourage you to get a Taylor FAS-DPD K-2006 pool test kit. It takes a little getting used to but it's worth the investment.

Pool Water Testing

Water Testing Kit

First is to get the pH and total alkalinity (TA) in line. The hardness is mostly for plaster pools so don't be too concerned about that with a vinyl above ground pool.

Next, I will assume with the new fill you don't have any chlorine or stabilizer (CYA). You'll want to shock the pool with Dichlor chlorine. This is a stabilized form of chlorine. Once you reach the 30 - 35ppm CYA mark, stop with Dichlor and go back to regular liquid chlorine.

Be careful when using Dichlor as it can get out of hand quickly. For every 10ppm of chlorine added with Dichlor, you'll raise the CYA by 9ppm. For every 10ppm of chlorine added with Trichlor tabs you'll raise the CYA by 6ppm. It's 1 1/3lbs. of Dichlor per 10,000 gallons of water to bring the chlorine level up 10ppm.

Never put tabs in the skimmer, always use a float.

Again, the above links have the info. you need and go into greater detail.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Start Up/Opening A Pool" category.

Check back to this post for updates or answers.

If you need immediate assistance (within 24 hrs) or for emergency personal assistance, you can make a donation of your choice and I'll answer your questions by phone.

Contact Me


Hope this helps and have a great Summer.


Click here to post comments

Return to Above Ground Swimming Pools.

Mobile & Desktop eBooks 

swimming pool care, basic pool care, above ground pool maintenance, inground, salt water

Click Here To Learn How This eBook Can Save You TONS Of Time & Money

Click Here To Learn The Best Way To Clear Up Your Pool 

Recent Articles

  1. I Have A Pool Leak Question

    We have a 23,000 gal pool salt water pool with cartridge filters and in ground cleaning system. Our skimmers do not suck. a large in floor return in the

    Read More

  2. White Water Mold In Hot Tub

    I have cleaned my hot tube with "Clorox", aqua fresh, brought the bromine/chlorine level to 4-5 and cleaned with ahh-some twice.

    Read More

  3. Pool Shock & Floc Not Working

    The water was green at start of this year. I brushed walls and floor and added 12 pounds of shock & 1qt. of algaecide

    Read More