| Yes, there are tests, but they're specific to the chemical in question, and most of them are not readily available to consumers (though you can probably order them) and are pretty expensive.
As far as letting it sit, it will work. The rub is that I don't know how long it needs to sit.
You could split the difference and do the alcohol thing once and then let it sit for a few weeks.
Really, I don't think a bit of Windex would be all that harmful. The specific substance that we're worrying about is listed as being "mildly toxic to aquatic animals." One alcohol wipedown and rinse, followed by a couple of weeks to let the remainder degrade, should make it absolutely fine for your fish. Last edited by sirdarksol; October 14th, 2009 at 11:22 AM.
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