Swimming pool FAQ

For additional information please email us at poolshop@proswim.com.au

Pool Chemicals Advice

Why is my pool green?

Lack of chlorine and or lack of circulation.

The correct amount of chlorine stabiliser must be used. For an average 50,000 litre pool the filtration must be running for at least 4 hours per day during winter and 8 hours per day in summer.

Causes of low chlorine

Chlorine Pools - must have the correct amount of chlorine added each evening
No stabiliser present to protect chlorine from UV rays
Saltwater pools - Insufficient salt
The chlorinator cell needs cleaning
Insufficient running hours
Breakdown of salt chlorinator
Black spot & green algae will burn up chlorine very quickly

Why is my pool cloudy?

A cloudy pool is usually the first sign of a pool turning green, so any of the above reasons could apply, but It can also be caused from...

Minute particles of dust
Calcium from granular pool chlorine
Filter system not working properly

What causes black spot Algae and how do I get rid of it?

Black spot algae usually develops when sanitiser levels are too low for some time. It's not uncommon for it to establish after a pool has been green a few times. The reason it is hard to get rid of is because it digs itself into the surface and has a waxy membrane to protect it. That's why it's important to scrub it regularly during treatment, to allow the chemicals to get in. Your local pol shop will have "Granular Algaecide" for the floor & step areas and use an organic copper based Algaecide. Never use ones that contain Copper Sulphate as this can stain the surface.

When do I need to add Chlorine to my pool and what type should I use?

Above ground pools usually use dry calcium based chlorine because it is not as corrosive as liquid chlorine. In ground pools usually use liquid chlorine because it is cheaper. Saltwater pools should only use sodium based chlorines such as liquid or stabilised powder chlorine. Calcium granular chlorine leaves a residual of calcium behind, that is the white substance you have to clean off the chlorinator cell. Why would you add more to be attracted to the cell? Large doses of calcium chlorine will cause cloudiness.

When water evaporates from my pool, do I loose salt?

No. Natural evaporation is between 2-4cm per week depending on wind and heat.
Salt and Stabiliser do not evaporate.

What is Black Spot and how do I treat it?

First establish that's what it is … Black spot algae is small to medium raised spots, some as big as your thumb nail and it's actually dark green when you scrape it off with your finger nail. Sometimes it's confused with Osmosis which only occurs in Fibreglass pools where as Black spot algae only occurs in Pebble & Marble interiors, slate steps and waterline tiles.

Treatment: Walls and floor or in tile grouting…

Turn salt chlorinators off till the next day for this treatment.
Dilute and add 200mls Hydrochloric acid per10,000lts, run filter 1 hour.
Add 1lt Liquid Chlorine per 10,000lts, run filter 1 hour.
Dilute and add 200mls Black & Tan Algaecide per 10,000lts, run filter 2 hours.

Treatment: Floor only…

Turn filter off and sprinkle 400gms Stabilised Chlorine per 10,000lts over spots, allow to settle for 2 hours then scrub using stainless steel algae brush.
Note: For bad infestations do both the above treatments.

Treatment: Step areas…

Turn filter off and sprinkle 200gms PQ granular algaecide per 10,000lts over spots, allow to settle for 2 hours then scrub using stainless steel algae brush.

How to add dry chlorine correctly?

Adding dry chlorine any other way will clog up your filter and / or send the water cloudy.

Add desired amount of dry chlorine to a bucket of pool water. Never add any more than 500gms per bucket of water.
Stir well for 2 minutes and allow to stand for 20 minutes. Do not restir.
Pour liquid only into pool. Dispose of residue. It makes a good weed killer but do not put in wheelie bin.

How do I use a Nature2 Spa Stick?

Nature 2 Spa treatment Program

Daily:
Filter 2 hours without use plus when using spa.

Weekly:
For light use (once or twice a week) sprinkle 1 level lid of "Shock plus" into spa. Use 2 level lids for heavy use (3 times or more a week). Optional - Add ½ level lid of Spa silk for softer nicer smelling water.

Monthly:
Sprinkle in 1 level lid of "Spa chlorine". Hose filter cartridge using high pressure nozzle.

*Initial start up & 4 monthly:
*Sprinkle in 1 sachet "Spa & cartridge cleaner" and run pump for 1 hour. Drain spa completely, wipe clean and refill. Soak filter cartridge in warm water and 1 sachet "Spa & cartridge cleaner" then hose cartridge using high pressure nozzle. Place a Nature 2 spa purifier inside your filter cartridge. Sprinkle in 2 level lids of "Spa chlorine" & run for 2 hours with the cover off before use. * = initially only.

What causes stains in my pool?

Bright orange / red stains that look like a sun burst are probably "reo rust" i.e. the steel reinforcing rods in the pool shell are rusting through. These can not be treated chemically. The pool needs to be drained to fix them properly.

Organic Stains:These are caused by leaves, debris, dirt, algae etc.

If on the walls… For Pebble and Marble interiors add a strong copper based Algaecide and scrub using Stainless steel brush. For all other interior types use a non copper based Algaecide and scrub using a nylon brush.

If on the floor or step areas… For Pebble and Marble interiors or slate steps, scrub using stainless steel brush first then sprinkle 500gms of Granular Algaecide over stains, leave filter off and allow to settle for 2 hours, scrub again then run filter 2 hours. For larger areas use 1kg Stabilised Chlorine instead. For all other interior types use as nylon brush and only allow to settle for 20 minutes.

Mineral Stains:

If caused by copper, iron, manganese etc from tap water... These minerals normally cause brown or black stains and is most commonly found in Fibreglass pools due to the sensitive nature of the gel coat surface. Add 1kg stain remover per 50,000lts. If the water turns cloudy then add 1lt clarifier per 50,000lts and run filter till clear, then clean filter. Turn the salt chlorinator off and do not add chlorine for 24hrs before and after treatment.

If caused from Algaecides that use inorganic copper sulphates… These are normally black stains spread all over the pool. An imbalance in the water chemistry causes the copper to plate out on the surface of the pool. Add 2kg stain remover per 50,000lts. If the water turns cloudy then add 1lt clarifier per 50,000lts and run filter till clear, then clean filter. Turn the salt chlorinator off and do not add chlorine for 24hrs before and after treatment.

If caused from metal objects lying in the pool… These will normally be in the shape of the object and are moved around by the auto pool cleaner giving the impression that there are several of them. Put a handful of stain remover into a filter sock, tie a knot and then place this onto the stain. Allow to settle till stain is gone then move onto the next stain. Turn the salt chlorinator off and do not add chlorine for 24hrs before and after treatment.

General Pool Questions

I think my pool is leaking.

Natural evaporation is between 2-4 cm per week, depending on how hot and windy it is. If the loss is greater than this you may need to get some professional help. Here is a link to our check list... leakingpools.doc

How do I drain water from the pool?

If you have a filter with a backwash valve it is simple. Turn the valve handle to "waste" or "bypass" and run the pump until the required level is reached. Do not move the handle while the filtration is running. If you have a cartridge filter you may have a waste valve, if not then water can be siphoned out with your garden or vacuum hose.

What is wrong with my pool when the Kids have ear ache?

Probably nothing! It is almost certainly Tropic Ear, a fungus growth caused by dampness in the ear. A Doctor can fix it very quickly, better still, teach your children to dry inside their ears as soon as they get out of the pool.

What is wrong with the pool, my Kids have sore eyes?

It could be that the pH level is either too high or too low, very occasionally if the chlorine is too high. More often than not it is simply that the children have been swimming underwater for long periods with their eyes open.

How can I prolong the life of my salt chlorinator cell?

Three things shorten the life of your chlorinator cell...

Running the filtration for long periods on low levels of salt.
Cleaning the cell in too strong a solution of acid. Always use a proper cell cleaning solution.
Not cleaning the cell often enough, leaving a build up of calcium.

How long should I run my pool filter and salt chlorinator?

During Summer: 2 x 4hrs daily / During Winter: 2 x 2hrs daily

There is water leaking from under my pool pump motor, what is wrong?

The mechanical seal needs replacing. It is important to have this simple repair done as soon as possible or further more expensive damage to the bearings will occur.

My pool pump and motor is noisy, it is making a whining or screaming noises.

The bearings and mechanical seal need replacing, if left the pump will eventually seize up.

My pool filtration is working but has very low pressure.

The impellor in the motor may be blocked from debris, check your pump basket for cracks. The filter may be very dirty and not allowing a good flow. The pump may be sucking air so check you pump lid for cracks and the condition of the pump lid O ring.

My pool is making a gurgling sound, what is wrong?

The water level is too low, it should be at least half way up the skimmer box opening, with about 2 cm (1") gap at the top. Don’t forget to bleed the air out of the filter!

My pool is not skimming the leaves, what is wrong?

Either the water level is too high, drop the water level to 2 cm below skimmer opening, or the weir door is missing.

How do I work out how much water is in my pool?

Average length by average width by average depth in metres equals volume in kilolitres.

What things should I consider when looking for a new pool filter?

Diatomaceous Earth(DE) Filters clean down to 3 microns and gives the best water clarity of all the types of filters. DE filters have a backwash valve for ease of cleaning but do require to be stripped and cleaned manually at least 3 to 4 times a year.

Sand filtersare the lowest maintenance and there for the most popular. They clean down to 20 microns and have a backwash valve for ease of cleaning. The sand lasts approx. 10 years.

Cartridge filtersclean down to 15 microns and are ideal for above ground pools or where water is scarce. They do not have a backwash facility so you need to hose the cartridge element manually. An element lasts approx. 5 years.

What are the advantages of salt water chlorination?

Salt water pools are easier to look after because they make the chlorine for you, which also means they are cheaper to run. The water is softer and much nicer to swim in. It also solves most eye irritation problems because the required salt level is the same as the salinity of our eyes. There are more salt pools in Australia than any other form of sanitisation.

How do I backwash my sand filter?

Backwashing Procedure...

Always turn the pump off before moving the valve handle.
Select the "Backwash" position and turn on pump.
Run for 2 minutes or till sight glass is clear.
Select the "Rinse" position and turn on pump.
Run for 1 minute or till sight glass is clear.
Select the "Filter" position and turn on pump. "Waste" is used to lower the water level or vacuum direct to waste. "Recirculate" is used when the pool is green so it doesn't clog up the filter. "Closed" is only ever used when the filter is below water level.

What is Osmosis & how do I treat it?

First establish that's what it is … Osmosis only occurs in Fibreglass pools where as Black spot algae only occurs in Pebble & Marble interiors, slate steps and waterline tiles. It is seen as very small grey spots usually with streak lines running through them and there may be lumps in the Gelcoat. It is a cosmetic condition of the Gelcoat and poses no threat, it simply looks horrible.

Treatment:
If the pool is over 15 years old, has bad Osmosis, or it's Winter…
Initially - add 2lts Hydrochloric acid per 10,000lts, run 4 hours.
Weekly - add 500mls Liquid Chlorine per 10,000lts.
September - Dissolve and add 200gms Buffer per 10,000lts per day for 6 days. Take sample of water to the pool shop for testing and fine tuning to get your pool ready for swimming again.

If the pool is under 15 years old, minor Osmosis, or it's Summer…
Sprinkle in 200gms PQ all purpose stain remover per 10,000lts. Repeat dosage after 7 days if some spots remain. Do not super chlorinate for 7 days before or after each treatment.

How do I clean a salt cell?

Salt cell cleaning procedure…
Normal units should be done monthly. Self Cleaning units should be done yearly.

Turn pump off.
Remove cell lead.
Remove cell and soak plates only (not brass terminals) in a proper salt cell cleaning solution for 30 minutes. Hydrochloric acid will shorten the life of the cell by attacking the plates.
Remove cell and rinse with clean water.
Refit cell making sure the brass terminals are clean & tight.

What things should I consider when deciding on a pool builder?

We are happy to help you evaluate any quotes. We can point out the differences between the quotes and make sure you are comparing the same thing. Always make sure they are a SPASA member and have a BSA license.

If you need any further advice for your pool, contact us anytime on 07 32697665