pH Alerts (three of them) failed or 'froze' within 2 days
The concept behind these is great and indeed the ammonia indicator works well but I had serious problems with the pH Alerts.
The first one 'froze' on me three days after placing in my main tank. Initially, it indicated the proper pH color as being 7.5, which I verified with my pH test kits. But suddenly, on the third day of use, it's color turned yellowish...to a color not at all on it's 'color wheel'. My tank's pH remained consistent at 7.5, however. I removed it and verified it was frozen on this color by subjecting the pH Alert to mildly acidic and basic solutions, to which it did not react at all. After writing to Seachem about this issue, I was sent two replacements with the thought being that mine was defective. However, both replacements failed in the same manner as the original within two days.
Given that the pH Alerts work for so many others, this must have something to do with my tank's chemistry, and the good folks at Seachem and I are still trying to figure this out. It is nothing obvious.
Bottom line: if the pH Alerts work for you, this is a fantastic product. I gave it 3 stars based on my experience and the fact that the Ammonia alert works, but I'd give it five otherwise.
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