Small Particles In Pool

by Joseph Kelley

I have a 20' x 48" intex pool with a swimline Sand Master Filter System. I'm using Aqua Chem filter sand plus in the filter.

But my water is cloudy and when I put some of the pool water in a clear glass I can see small particles floating in the water.

Should I change to regular pool sand or do I have other problems?

All chem. levels are good tested several times.

Thanks for the question Joseph

Aqua Chem sand has been around for a while and it seems to be pretty good. I know the company makes the claim of filtering 10Xs better than regular #20 silica sand. Regular pool sand is between .45 - .55mm. This should be the range that the Aqua chem filter sand has. If not, it might not be filtering properly. 10Xs better than sand and you're getting to a cartridge filter, with DE right after that at 1 - 3 microns.

I also am hesitant to say, with any degree of certainty, that the Aqua Chem sand filters 10Xs better than regular sand. I tried to find information about that on the web, instructions or experiments that have been done in real world tests. I couldn't find any. I found the company number. It's 800 - 964 - 7035 but couldn't get a person to talk to. Another number 800 - 252 - 7665. Couldn't get a person.

I do know that Aqua Chem sand is a 2:1 replacement ratio. To get the same filtering properties as sand you will need 175 pounds of product.

If you just replaced the sand, within the last 2 weeks, there will be a settling period. This is where the new sand needs to become a bit dirty and the pressure needs to rise a little to filter properly. While this is happening you might get some dirt and sand going back into the pool through the returns. This is normal and should decrease as the sand gets used.

It's hard to say why the water is cloudy without a set of test results. There are dozens of reasons why a pool is cloudy.

Cloudy Pool Water

I'd like to have your complete chemical readings:

Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, and Metals (iron and copper).
It makes troubleshooting much easier and the process of clearing up your pool will go much faster.

You can get this done at your local pool store. Without these numbers I'm just guessing at what the problem is. Chemical levels that are "good" can be subjective.

Get back to me with the chemical numbers and I'm sure I can help.

Hope to hear from you soon.


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Sand in Pool After Replacing With Hayward Filter

by Wayne

Same problem but I took it one step further and replaced the filter and multipart with a Hayward filter. Need to vacuum daily or sand accumulates.

Installed properly in October of 2011. 4 months later still have sand.. Pulled out new lateral assembly to checks for broken parts but found none.

Have 12 psi on pressure gauge. Could I have a leak on the 25 years old in ground pool?

When the multiple port is on filter and all the skimmers are shut off to vacuum the sand out of the pool, I have good suction.

If I had a pipe underground leaking or sucking in sand, would I still have such good suction?

Thanks for the question Wayne

You've probably been through some other questions about sand going back into the pool. This is a very common problem with sand filter and is one of the most frequent question I get.

Swimming Pool Questions and Answers

And this one:

Replaced Lateral But Still Sand In Pool

1. Broken lateral and/or diffuser

2. Channeling

3. New sand

4. Old sand

5. Not doing the RINSE after back washing

6. Lateral impacted with sand and/or debris

7. Not having the correct measurement of freeboard

Sand, with good maintenance, can normally last anywhere from 5 - 10 years.

Here are some other tips you might want to consider. Before adding the sand, the tank needs to be filled with water. This will disperse the energy of the sand hitting the laterals and possibly damaging them.

Next is to check the standpipe and get that seated correctly. Another suggestion is to be sure you're doing a RINSE after backwashing. Even though the laterals are in place, you must be sure they're seated correctly. There can't be any space between them.

Having a too powerful motor can also cause sand to return back to the pool.

Also check the spider gasket for any tears or rips. When installing the gasket, be sure to tighten the multiport valve across, in an "X" fashion. Don't simply go clockwise or counter-clockwise. By doing either of those, it may pinch the gasket. This will cause it to not seal correctly.

Hope this helps and let me know how it turns out for you.


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Problems With Sand Filter & Pump For 16 Foot Above Ground Pool

by Steve

The filter and pump are running, but there isn't any jet coming out into pool outlet. No swirl in pool at all.

Didn't know if our filter and pump are bad or what. They are over 10 years old and Hayward models.

I have a small leak coming out from backwash outlet. It has the right sand and amount in it.

Thank you for your time.

Thanks for the question Steve

Here are some very similar posts to look over:

Little To No psi

Noisy Sand Filter And Sand Coming Out Waste Line On Backwash

Water Coming Out Backwash Hose? I Need Help

Little to no pressure could be a few things. The links above go into a bit more detail, but here's the start:

- Be sure the sand is at the right level. This is known as "freeboard".

- Baquacil and similar products can clog up your sand

- Be sure the impeller is not jammed up with debris

- Back wash the filter

- Check the pressure gauge. If it drops to zero when the pump is off, then resumes when the pump is on, the gauge works. If the needle sticks when the pump is off, replace the guage.

- Are there any bubbles coming out of the returns? If there is you may have a suction side leak

- Be sure the water level is between 1/3 - 1/2 up from the bottom of the skimmer

- If air bubbles are coming out of the returns, it could be a suction side issue. One of the more common places for this to happen is the pump lid. Be sure it's seated correctly and the gasket is in good shape.

- Skimmer and pump baksets should be clean

- Close (only temporarily) all valves except the skimmer valve. If you have no suction, the line might be clogged. By closing off a valve and keeping one open you'll know which line, if any, has the clog or leak.

At this point you may want to call a professional pool tech to unclog the line.

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.


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