Strips are rather inaccurate. However, the pH and alkalinity results are easier to read with reasonable accuracy than the stabilizer (cyanuric acid) results.

The problem is that the range on the pH scale isn't going to reach 6.0, and the discrimination on the alkalinity test is usually too poor to allow you to distinguish 30 ppm TA from 80 ppm TA. But getting the TA below 100 ppm is more important than keeping it above 30 ppm.

But you must NOT allow the pH to get too low. 6.0 is a somewhat arbitrary figure, but pH = 4.0 is likely to damage your pool. Chinese made cheap pH meters are available in the USA; you may be able to find them in Denmark. Hanna Instruments is selling cheap Chinese made pH meters all over the world: http://www.hannainst.com/usa/about.cfm . You may be able to find a source you can use. You MUST purchase pH buffer solutions for calibration, as well. PH meters can NOT be trusted at ALL if they are not calibrated.

Good luck.