– Let’s look at a few advancements in the maintenance of pools over the years. Before the mid-70s, test kits usually only included pH and total chlorine tests, while testing for alkalinity and calcium hardness was almost non-existent. Now, test kits, including test strips, are more sophisticated which includes testing for alkalinity, and calcium hardness. Mini spectrophotometers and pH meters are now available for more reliable readings. Mini labs are available for very accurate titration capabilities. Of course, we are always available for Free water testing at The Above Ground Pool & Spa Company