Keep Testing – Keep Control – Keep Safe
Keep Testing – Keep Control – Keep Safe
What is Alkalinity and should I be worried about it?
What is Alkalinity and should I be worried about it?
With all pools and hot tubs one of the most important jobs is making sure that your water is regularly tested and safe to use. There are a number of parameters that can be measured including the disinfectant levels (usually chlorine or bromine), pH and alkalinity. But what is alkalinity?
What is Alkalinity? Alkalinity, normally referred to as total alkalinity, is the measurement of the alkaline salts (carbonates, bicarbonates) within the water and expressed in ppm or mg/l. It also gives an indication of the water’s resistance to change as the higher the level the greater the buffering capacity of the water. Pure water has very little buffering capacity so is susceptible to wild changes in pH when adding chemicals. This can lead to what, is sometimes referred to as ‘pH bounce’ when the pH becomes difficult to control. If the levels are too high then the pH can ‘lock’ and become difficult to move.
What level should you be looking for? To avoid pH bounce or lock you should be looking at a total alkalinity level of no less than 80ppm and no higher than 160ppm. The lower limit is also important as not only can this result in pH bounce but also some flocculants and clarifiers do not operate correctly below 80ppm. Commercial alkalinity increasers are available if the level does need to be raised. Reducing alkalinity levels is a little trickier.
How do I test for alkalinity? Rapid tablet test kits are available to measure total alkalinity. These are easy to use, work on proven chemistries and give accurate and repeatable readings. You can also measure alkalinity on electronic devices such as the Scuba II – these give the readings in a clear digital format so are easier to read.
Should I be worried about total alkalinity? You should know your total alkalinity level but you should know all your pool chemistry levels otherwise how do you know the water is safe? You should be testing regularly throughout the day especially in a hot tub as conditions can change quickly due to the relatively small volume of water. ALWAYS test the water before the first use of any day. Poor water can cause serious issues.
So should I be worried? You should know the levels, you should monitor the levels and you should adjust the levels if there are issues - but do not chase alkalinity levels to the detriment of other parameters.
Take the hassle out of getting your test kit or refill packs. Order online and get them delivered directly to your home.
Would you prefer to head down to your local pool or hot tub shop? If so we've listed some of our preferred suppliers for you. Take a look and see if there is a shop local to you.
The Lovibond® Compact Pool Test Kit enables you to measure accurately the key parameters of chlorine, pH and bromine easily and accurately ensuring your water is safe for all users. Suitable for all pool and hot tubs.
The Scuba II takes testing to the next level as the meter gives a digital readout taking away the need to compare colours. This handheld unit is easy to use and will measure chlorine (free and total), bromine, pH plus total alkalinity and cyanuric acid making it a must for all pool and hot tub users.
A firm favourite with pool users for many years the Lovibond® Pooltester gives accurate readings for chlorine and pH. The large blocks means colour matching is easier for enhanced user confidence.
If you are running low on tablets then our re-fill packs will be just what you need. Available for all of our test kits these handy packs will ensure you can keep on top of your water testing.
