RD.
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jaws7777
Drstrangelove
Angelphish
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Just Toby
kno4te
philipraposo1982
duanes
Some people believe performing large water changes can hurt or even kill their fish. I've even seen threads where it's also been suggested that large water changes can harm or kill the beneficial bacteria. So, only a small amount of water is changed at a time (10 - 30% max).
Others believe that large water changes do not harm fish and they perform fin-level water changes or more (75 - 90+%). They drain the tank as low as possible so they can change as much water as possible at once. The size of the water change is mainly limited by the size/height of the fish.
What do you believe? Can large water changes harm fish? Can they kill the beneficial bacteria? If so, why? I hope we can reach consensus on this and also about why there are two schools of thought.
Some people believe performing large water changes can hurt or even kill their fish. I've even seen threads where it's also been suggested that large water changes can harm or kill the beneficial bacteria. So, only a small amount of water is changed at a time (10 - 30% max).
Others believe that large water changes do not harm fish and they perform fin-level water changes or more (75 - 90+%). They drain the tank as low as possible so they can change as much water as possible at once. The size of the water change is mainly limited by the size/height of the fish.
What do you believe? Can large water changes harm fish? Can they kill the beneficial bacteria? If so, why? I hope we can reach consensus on this and also about why there are two schools of thought.