Topic: tank water

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Posted by: tom
Posted on: 2002-09-06 10:33

hi all

can anyone tell me how many time I need to change water per month ?
Yes, I am keep a fish tank only, my tank size :
40" x 24" x 36"

thank you
tom
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Posted by: haiven
Posted on: 2002-09-06 10:39

到這裡看看吧。
http://www.aquarium.org.hk/cgi-bin/ch/topic_show.cgi?id=2008&h=1&bpg=1&age=0
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Posted by: iwave
Posted on: 2002-09-06 10:44

I change 20% water of my main tank once a week.

In fact, it would depend on the NO3 concentration of the existing tank water.
If NO2 = 0, NO3=0, the PH is stable between 8.1-8.4, the water is clean and no drug has been added, I think there is not necessary to change the water.

My target is performs the condition of my tank which do not need to change water bcoz a complete natural cycle will be performed but.... haha.... it is extremely difficult.
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Posted by: tom
Posted on: 2002-09-06 12:44

hi,

thks for your all the advise, I think I know how to handle my tank la...
for change water.

thank you
tom
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