Seachem Alert to monitor NH3 and pH?

[ashtricks]

So finally I have the time to dedicate to discus once again, and figured out a better way for me to do water changes. I lost my last batch to funky water during a water change. So this time I want to keep some testing inside the tank. Has anyone used the Seachem Alert badges in the tank? I am not looking at them to get accurate pH or ammonia readings, but just to monitor change. Are these any good?
For accurate readings I will still end up using the test kits.

[ashtricks]

Forget it, research shows not quick enough for my use case.

[Clawhammer]

I think the ammonia alert is excellent, especially that it only detects harmful NH3. The pH alert's colors make it difficult to read and not as useful IME

[Paul Sabucchi]

I tried one of the ammonia allerts in one of my tanks but difficult to tell how useful it is as the ammonia is always undetectable in all of my tanks. I would anyway expect that a reasonably cycled tank would cope quite easily with a reasonable increase of the ammonia concentration. The resulting nitrites may be a bit more of a problem (the second set of useful bacteria multiply even slower).