For the first week, keep the same concentration of chlorine as you normally use, but stop using all other products.

What’s most important is to maintain alkalinity and pH levels within the recommended ranges (alkalinity: 80–120 ppm [mg/L] / pH: 7.2–7.8).

Two days after you stop using other products, backwash the pool and pour the first weekly dose of CRYSTALLINE H2O into the skimmer.

Over the next two weeks, monitor the concentration of chlorine as it gradually decreases to a minimum of 0.8 ppm (mg/L).

Once the water is balanced, you shouldn’t need any chemical products other than CRYSTALLINE H2O and a bit of chlorine to maintain a concentration of at least 0.8 ppm (mg/L).

The filtration and circulation systems must be in good condition. You will need to use a superchlorination treatment (shock treatment) and vacuum the pool.

Make sure the water’s alkalinity level is between 80 and 120 ppm. Once the water is clear and clean, you can balance the pH (between 7.2 and 7.8) and pour the first weekly dose of CRYSTALLINE H2O into the skimmer. Dilute a second dose in hot water, and then distribute it throughout the pool.

At that point, the concentration of chlorine should be relatively high (1.5 ppm). Let it gradually decrease to 0.8 ppm (mg/L) and keep it no lower than that level all season long.

A double dose is only required when opening and closing your pool.

Chlorine should be added as often as needed.

However, remember that when using CRYSTALLINE H2O, the ideal chlorine concentration is only 0.8 ppm (mg/L), so you’ll need to add much less chlorine than before.

What’s more, thanks to CRYSTALLINE H2O’s stability, it’s easier to maintain the concentration of chlorine at the recommended level.

For a residential pool, the most practical way to check the concentration of chlorine in the water is to use an inexpensive test kit available at hardware and pool stores.

Make sure to buy new testing solution every year, as it can lose effectiveness over time.

Another popular way to measure the concentration of chlorine is to use test strips that you dip in the water.

Yes, CRYSTALLINE H2O is perfectly compatible with all types of chlorine.

However, you don’t need to use stabilized chlorine, which is usually more expensive. All you have to do is make sure the concentration of chlorine in the water stays at a minimum of 0.8 ppm (mg/L).

The quantity of chlorine required to reach a concentration of 0.8 ppm will vary depending on the type of chlorine used (liquid, granular or solid). If using solid chlorine pucks with an automatic chlorinator, simply adjust the flow to 0.8, which is close to the minimum flow rate.

Yes, all you have to do is double the regular dose of CRYSTALLINE H2O before you go, and our product will help keep your water clean for up to two weeks without the need to add anything else.

Yes, CRYSTALLINE H2O is perfectly compatible with bromine and any other similar disinfectant.

One of the main functions of our product is to maximize the disinfectant’s effectiveness while using less of it. Bacteria are therefore successfully destroyed before they can spread.

When used in “normal” water (alkalinity between 80 and 120 ppm), CRYSTALLINE H2O will maintain the pH level between 7.2 and 7.8 in most cases.

The effectiveness of our product does not really depend on pH variations. However, it is a good habit to regularly check the pH level: if it’s too low, the water will become corrosive, and pH that is too high will cause scaling and leave deposits in the water.

No, CRYSTALLINE H2O cannot regulate alkalinity levels. Our product does many things, but like other pool water maintenance methods, this is not one of its functions.

Our product will not work properly in unbalanced water. To achieve the desired results, the alkalinity of the water should be at a normal level. We recommend adjusting the balance of chemicals in your pool at the very start of the season.

Certain conditions or events like acid rain or frequent refilling with unbalanced water will of course affect the alkalinity of your pool water. That’s why it’s a good idea to check the levels every week, and make adjustments as necessary.

Note: No matter what maintenance method you use for your pool, no product, including chlorine, will achieve proper results in unbalanced water. A normal alkalinity level is between 80 and 120 ppm (mg/L).

YES, absolutely! One of the ingredients in the CRYSTALLINE H2O formula is a powerful algicide that eliminates algae at the source. Using the recommended amount of the product in normal water conditions means your pool will always be free of algae. And with no algae, you’ll need even less chlorine to keep your water clear and clean.

You’ll never need to purchase an algicide again if you use CRYSTALLINE H2O as recommended with a little chlorine.

Our product contains an active ingredient that combats algae growth, and it also multiplies the effectiveness of chlorine.

If you use CRYSTALLINE H2O as directed, it will be the only product you need for your pool water, along with a bit of chlorine or bromine.

Exceptions may arise following weather events like acid rain or a refill with water that has unbalanced alkalinity levels, or if your pool is subject to overuse.

CRYSTALLINE H2O is a great way to keep your water clear and algae-free during the off-season. And it’ll be much easier to get crystal clear water when summer comes around again.

Click here for the procedure to follow.

Yes, our product is totally compatible with all types of pool heaters.

Damage to heaters, liners and equipment is generally caused by corrosive or acidic water or water that is too alkaline (scaling).

The required weekly dose of CRYSTALLINE H2O is calculated in proportion to the volume of your pool.

Click here to see our online chart.

More simply, the ratio is equivalent to 4 grams of the product per 10,000 litres of water, each week.

For example, a 60,000-litre pool will require 24 grams of CRYSTALLINE H2O per week.

Nothing will happen if the water is properly balanced (alkalinity level at 100 to 120 ppm, pH at 7.2 to 7.8).

However, if the water is too acidic and the pH is too low, you may see stains on the bottom and sides of your pool (read the next question to learn how to get rid of these stains). The water may also turn green, due to the acidic water reacting with the copper sulphate in our product.

On the other hand, if the water is too alkaline and the pH is too high, you may see metal deposits.

So, if you accidentally spill the whole container into your pool, just be sure to keep the water properly balanced to avoid any such problems.

You can also gradually replace the water by doing several backwashes. If the water has turned green, increase the chlorine level and use a product that controls metals, available at pool retailers.

All that said, an accidental spill poses no danger for swimming.

Stains are a sure sign that your water is unbalanced. You must first adjust the pH and alkalinity to appropriate levels before taking any further steps.

The next step is a chlorine shock treatment. To shock your pool, put a chlorine puck or one cup of granular chlorine (preferably sodium hypochlorite) inside an old sock, and place it directly over the stain you want to remove. You can leave the chlorine on the stain until it disappears. The puck or sock can then be moved to another stained area. Repeat until all the stains have been removed.

YES! When used correctly, CRYSTALLINE H2O is completely safe for swimmers and poses no risk to equipment like pipes, accessories and heaters.

Of course, as with any pool maintenance product (and chemical products in general), you must not ingest it, although you would have to ingest a rather large quantity of CRYSTALLINE H2O for it to be truly dangerous..

CRYSTALLINE H2O has been officially approved by the public health authority of the governments of Canada (Health Canada, 1996), the United States (U.S. EPA, 1998), Hungary (the Hungarian approval number is OTH 688/2005) and Switzerland (Federal Office of Public Health, 1999) for use in both private and public pools.

No, CRYSTALLINE H2O will not stain your pool’s liner or concrete walls. That said, pool owners have been dealing with the issue of stains for a long time, well before our product arrived on the market.

There are two main causes of stains in pools: algae and metal oxidation. Unbalanced water is fertile ground for these problems. When chlorine is ineffective due to abnormal pH levels in the water, algae will grow. Water that is too acidic causes certain suspended metals to oxidize, leaving a rust-coloured residue on the liner.

Some stains will have a different colour, depending on the type and concentration of metals in the water. For example, water from an untreated well will often contain a higher concentration and diversity of suspended metals.

It is virtually impossible for CRYSTALLINE H2O to block conventional sand filters. In the rare event you have a diatomaceous earth filter, you’ll need to use a different method for applying the product.

Like any chemical product for pools, CRYSTALLINE H2O is toxic by definition. However, it is not really dangerous unless large quantities (over 250 grams) are ingested.

It is not toxic when diluted in the pool, simply because of the very low concentration in the water. When used at the recommended dose, even if you swallowed several litres of pool water, there would be absolutely no harmful effects on your health that could be attributed to our product.

No direct link between the use of our product and changes in hair colour has been established.

For decades now, hair discolouration in frequent swimmers has been attributed to very high concentrations of chlorine in pools, and our product reduces the amount of chlorine needed.

Adding CRYSTALLINE H2O to your pool allows you to use significantly less chlorine in the water. It also reduces the amount of chlorine that evaporates into the atmosphere and the amount released into the soil or drains during backwashes. We can therefore say that it makes a significant contribution to efforts to protect the environment.

We’d also add that in 2005, our product received the prestigious “Golden Seal of Approval” from the United States Environmental Protection Agency.

No, Crystalline H2O has no effect on the hardness of water. There is no link between our product and the hardness of the water in your pool.

Depending on your municipal water source, or if your water comes from a well, it may be softer or harder than the water of a similar pool located elsewhere.