05-19-2007, 08:15 PM
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Just a suggestion- don't use test strips, but a liquid test kit. API master is what most of us use. The strips are very inaccurate and you will no doubt get a very different reading from the liquid test.
Keep doing water changes and test the water (with the liquid test) until your nitrates are down.
I do agree that the female to male guppy ratio is a bit off for a 10 gallon tank. Not sure if they were harassed to death (exhaustion) or if it was the water parameters that did them in... sorry about the loss.