Seachem Ph Alert for Freshwater

I been using Seachem alert for last two months,initially it was working,currently the readings are completely wrong

Apesar de ser mais barato que em lojas físicas, vale mais a pena fazer os testes manuais msm. Coloquei o produto conforme descrito na embalagem. Além das cores não serem bem distintas, aparentemente mudou de cor apenas na primeira vez, mesmo eu tendo corrigido o pH algumas vezes.

This product does not work only shows a beige colour that is not one of the colours on disc even though testing with liquid testers and electronic calibrated testers show water to be exactly 7 pH which should show as orange on disc not beige. This is second one bought as thought first one was just a faulty card but results exactly the same. Useless!

Me ha gustado el producto, el problema es que solo pedí uno y me han enviado 2 con un mes de diferencia sin mi consentimiento y para colmo, me está intentando enviar un tercero. No envíen más por favor, cancelen lo que sea que será un error, no quiero uno al mes.

Lost some fish and I couldn’t figure out why till I got this. To top it off I don’t have to test the water with strips all the time. A simple visible always on indicator is exactly what I needed

I thought this was a great idea and would save some work. But the colour in the central indicator never matched any of the colours surrounding it. This made it confusing and quite difficult to read. I even had others try to read it for me with the same result. Back to the test liquid now.