My guppies are dying

Hi,

I found three dead on Monday and two more today. They were only 3 and 4 months old and living in the same 30 gallon tank they were born in with the same water temp.

Last week I thought I had an ammonia problem, but after having the water tested at Petco and retesting again at home with a new (liquid) test kit everything came back ok other than the PH being a bit higher than normal at 7.8. Ammonia and nitrites are both 0 and nitrates between 5 and 10. The only changes I have made are rehomeing some of the larger platy and guppy babies and add a couple of inch long albino bristlenose.

All of them are eating and I haven't seen any of them acting strangely, or looking sick. I just don't understand what is going on.

Does anyone have any ideas as to what is going on or what I can try to keep the rest of them safe?

Please help.

Thanks!



I didn't find the right solution from the Internet.



References: www.aquariumforum.com/f33/my-guppies-dying-80258.html


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