For some years I have been using the DPD1/Phenol Red tablet test kits to test the FC and PH of our pool. At the moment I am getting FC at 3+ and PH exceeding 7.8 (despite regular ph-lowering dosing). I have tried using 5 in 1 test stips, but with no great confidence, they always seem to show readings as OK, when the Tabs show high. So my first question is, is the DPD1/Phenol Red tablet test kit accurate?
I would really like to know what the state of our water is, with a comprehensive test kit. The DPD1/Phenol Red tablet kits and test strips seem to be the commonly used test apparatus in the UK. I can find Lovibond photometers, at an eye-watering price ranging from £300 (3 in 1) to £600 (9 in 1). Oh yes, plus £50 for a chlorine calibration standard. When I see the Taylor TF100 going for $50 in the States I despair. So the second question is (for UK forumites, I guess), is there a reasonable testing kit available in the UK which will give me the same scope as the TF100 at a sensible price?
If not, then I am quite happy to continue to use the DPD1/Phenol Red tablet test kit for FC and PH. Are there kits to test separately for alkalinity, CYA and calcium hardness?
PS I have found the Hanna HI-3825 for around £140. It tests 'everything required to carry out testing for the critical pool parameters including Alkalinity, Bromine, Chlorine and pH'. A little more info would be a help. Anyone use one of these?