50% weekly water changes safe for fish?
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50% weekly water changes safe for fish?

This is a discussion on 50% weekly water changes safe for fish? within the Freshwater and Tropical Fish forums, part of the Freshwater Fish and Aquariums category; --> I am going to start a planted tank and will be using EI dosing which requires 50% weekly water changes. I am used to ...

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50% weekly water changes safe for fish?
Old 12-28-2008, 12:30 PM   #1
 
50% weekly water changes safe for fish?

I am going to start a planted tank and will be using EI dosing which requires 50% weekly water changes. I am used to changing about 25% weekly but 50% seems pretty high.

Wouldn't it be kind of rough on the fish?

Thanks!
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Old 12-28-2008, 06:39 PM   #2
 
a max of 20% each 2 weeks or 10 % each week is sufficent (unless you are having a water quality problem) if EI dosing requires 50% then I personally would not use it. plants do not like "new" water nor do they require it. an aged tank is ideal. what piqued your interest in EI dosing?
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Old 12-28-2008, 06:44 PM   #3
 
Depending on water quality and fish kept, 25-50% is fine.

For example, a lightly stocked tank 10G tank with only two to five small fish can have 25%. But a 10G tank that is heavily stocked or with fish that are messy (Puffers, Goldies, etc), should have 50%.

But I know nothing about EI dosing. But as stated, 50% should not be too hard on the fish.
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Old 12-28-2008, 08:04 PM   #4
 
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50% no problem for fish. Not sure about plants though.
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Old 12-29-2008, 09:13 AM   #5
 
Thanks!!!
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Old 12-29-2008, 09:22 AM   #6
Kim
 
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As long as the new water is the same pH, temp, and hardness I don't see why it would affect the fish. Actually, you'd probably have very low nitrates which is good for your fish. I can't be sure about the plants though, I'm no expert and am just happy when mine grow!
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Old 12-29-2008, 09:32 AM   #7
 
You should only be doing 25% at the max, i would do about 15%, unless your water qualityis really bad, then do more
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