My fish die after a tank clean - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 11 Old 09-20-2012, 12:15 PM
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I'm not clear why daily water changes are needed at this stage... but water changes are beneficial so no real harm. If you are testing ammonia and nitrite and either is more than zero with the API liquid kit, then a daily water change should be done.

There is no question but that the monthly water change and related cleaning was causing a significant alteration in water quality, which could have been any one or more of the ammonia, nitrite, pH, nitrate.

You mentioned pH being normal, but we don't know what this may mean. What is the tap water pH and what is the tank water pH? And when testing tap water, put some water in a jar with a lid and shake it briskly for a few seconds before testing. This outgasses the CO2 (carbon dioxide) which can cause a lower pH reading.

Do not use any products to deal with algae; these are chemicals that will affect some plants and fish.

Never use pH adjusting products, as the pH is the result of a complex chemical process and these products are highly stressful to fish.

Knowing the above numbers will allow us to sort this out.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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