What Valve Setting On Sand Filter Should I Use When I Vacuum My Pool?
When you vacuum the pool, what should the valve on the sand filter be set at? If I use the regular filter setting and have completed the vacuuming, I see green water shooting back into the pool from the return.
I asked the local pool co. what setting should it be on & their answer to me was "what setting does it work best on?"
I've tried using pump to WASTE but the water level goes down too fast to completely do the entire pool. So what setting & how do you keep the green from going back into the pool?
Thanks for the question Lynn
There are 2 settings that you can vacuum; FILTER or WASTE. As you already know, when you vacuum to WASTE the water level will drop.
FILTER is just that, dirty water goes in and clean water should come out. The questions says you're getting "green stuff" coming out of the returns. I would say this green stuff could be algae. I would ask what are the chemical readings, especially your chlorine level. It should be between 1.5 - 3.5ppm and the cyanuric acid (CYA) between 30 - 50ppm.
You may also have a couple of issues with your filter. Turn off the pump and open the sand filter. Check for channeling. This is when the sand becomes clogged with oils and debris. Water will find its way down the edges of the filter
and be returned back to the pool as dirty water.
You can feel around the edges of the sand for holes, pits, etc. If you have channeling, you'll need to degrease the filter. It's easy to do, so email back if you have this problem. I can walk you through it.
If you have an algae problem, the best thing to do is shock the pool. Here are a couple of links for that:
Swimming Pool Chlorine
And for clearing up a green pool:
Swimming Pool Algae
Green Pool Water
The links have chlorine charts for your size pool. It shows how much you need for a good pool shock. Try to go a little over the 10Xs shock, maybe up to 15ppm. It's better to go a little over then not hit the mark.
Shock at night and retest in the morning. Always give your pool 1 complete turnover before making another adjustment.
Pool Opened By A Company On Monday -- It's Still Green Water On Thursday!
Shocked The Pool & Still Having Swimming Pool Algae
Look over these pages as well. The first one has a slight legal issue, but your can disregard that and just focus on the algae problem.
Be sure you have enough sand in the filter.
Change The Sand In Above Ground Pool Sand Filters
Be sure to read the entire page.
Hope this helps and have a great swimming season.