I've spent some time researching the forum, but I can't find a definitive answer: is there currently a supplier of FAS-DPD test kits in the UK or Europe?
For day-to-day testing, I use a Scuba+ from Tintometer (for FC, TC, CYA, pH etc). This seems to give pretty reliable results (though no doubt with spurious accuracy in the last decimal!). And with 50 per cent dilution, I can test for FC up to 12ppm. But my shock target is 16+ and so I'd really like to be able to use an FAS test rather than rely on pro-rata guesswork. Can anyone advise on current suppliers?