How To Clear Up And Clean
A Green Swimming Pool
By Daniel Harrison,
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There are only
three things that will clear up a green swimming pool...
1 - Your filter
2 - Your pool chemicals
3- And you !
Unfortunately, there is no magic way to turn a
green or black pool clear overnight ! It usually takes a lot of
time, effort and money to clear up a typical "swampy"
green pool. It is certainly best if you never let your pool water
get this dirty, however most pool owners experience a "green
pool problem" from time to time.
Although it is not easy work, there is a
proven method of clearing up a green, black or very dirty pool in
the shortest time possible.
Follow the instructions below for the
- Remove most of the large debris from the
pool floor with a large leaf net (not a hand skimmer!). This
will stir up the water, and may make your pool look much worse
temporarily, but the stirred up debris will settle within a few
hours. DO NOT ATTEMPT TO VACUUM THE POOL IF YOU CANNOT SEE THE
BOTTOM OF IT OR IF YOU HAVE A LOT OF DEBRIS ON THE BOTTOM. YOU
MAY CLOG YOUR SKIMMER, FILTER OR UNDERGROUND PIPES !
- Adjust the pH and Alkalinity levels of the
water using pH Plus, pH Minus and Alkalinity Plus. These levels
must be within the proper ranges or the water will never clear.
- Shock the pool. This means super
chlorinating the water to kill off any bacteria and algae. If
your pool is very dirty, it may need MANY gallons of liquid
chlorine (shock) over a period of days before the water clears.
Start off by adding 3 or 4 gallons, and if you see no results
overnight, add 3 or 4 more gallons the next day. Continue this
process until you notice the water changing color to either
cloudy white, light green or clear. YOU CANNOT OVER SHOCK A POOL
! The more you add, the quicker it will clear ! Note...shock is
available in liquid or powdered form, but we recommend using
liquid (it works faster). You may also want to add a high
quality algaecide to the water at this point.
- Run your filter 24 hours a day and backwash
3 or 4 times a day for quickest results. Green or cloudy water
will quickly clog a filter, therefore you may have to backwash
your filter many times a day until the pool clears. THIS IS
NORMAL ! Remember, you cannot over-backwash a pool filter. The
more you run your pool, and the more you backwash the filter,
the faster the pool will clear up. If you have a D.E. filter,
remember to add new D.E. to the skimmer closest to your filter
after each backwashing. A D.E. filter is more work than a sand
filter, but the D.E. filter will clear a green pool about 50%
faster than a sand filter.
- If you follow these instructions and your
pool does not clear up within 4 or 5 days, your filter may not
be functioning properly. If this is the case with your pool,
have the filter system checked out by a professional. The pool
will never clear up if the filter is not working properly !
- Once the water does clear up, you will most
probably see debris on the pool floor (dead leaves, algae,
etc.). If there is only a small amount of debris present, you
may want to vacuum it up using your own pool vacuum system. If
there is a lot of debris on the pool floor, you should have the
pool professionally POWER VACUUMED. This will save a lot of wear
and tear to your filter system, as well as assuring that no
debris gets clogged in your pool pipes.
- We strongly urge you to watch our most
popular You Tube video,
"How To Clear
Up A Green Pool", where we through every step in detail for
- Make sure you have all the necessary
chemicals and cleaning products that you will need to do this
job before you start. Here is a short list and links to of
some of the products you may need:
Swimming Pool Chemical Dept.
Systems For Swimming Pools
- Read up on the basic concepts of a
swimming pool, so you are familiar with your system and your
chemicals. Here is a short list and links to of some of the
articles you should read:
Pool Water Chemistry - FAQ's
Pool Water - Troubleshooting Guide
Advanced Pool Chemistry
How to Open your Pool
Pool Water Chemistry - Instructions
How to Backwash a DE Filter
How to Backwash a Sand Pool Filter
Need More Help?
Can't find what you need?
Feel free to give us a call.
Poolandspa.com's Customer Service Hotline
1-800-876-7647 or 1-702-437-4343.
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