Guppies are known for their hardiness and great ability to adjust to different environments, but if you really want your guppies to feel comfortable, there are some general recommendations for making your aquarium the best place for their exact needs.
The easiest way to do this is to mimic the atmosphere from their natural habitat in the waters of the Amazon River or rivers and lakes all across South America.
The ideal water temperature for guppies is anywhere between 10⁰- 29⁰Celsius (50⁰F – 84⁰F).
One thing particularly important is consistency; too much fluctuation in temperature can cause significant health issues, specifically if the temperature drops suddenly and drastically.
The ideal pH level for a guppy ranges from 6.8 to 7.8, the value found in their natural habitat.
The ideal water hardness for guppies is dGH 8-12.
The correlation between water hardness and pH is very important.
Usually, the higher the water hardness, the higher the pH level is.
The general rule for most species is to change half of your water every week so it always remains fresh and clean.
You can do this in many ways; some people recommend changing 10% of your water every day in order to keep your water in great condition.
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