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Old 03-25-2012, 02:40 AM   #1
WVDiscGolfer
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Water Changes


Question:

Am I harming or stressing my fish by doing large water changes? I have two tanks that are moderately planted and not overstocked. Right now I'm changing about 75% of the water weekly. I guess I'm operating under the assumption that as long as I'm still seeing particles being removed by my vac then why stop at 30% etc.

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Old 03-25-2012, 02:45 AM   #2
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I wouldn't change more than 50% personally, due to the fact that that's a pretty big change in parameters depending on how you alter water.
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Old 03-25-2012, 02:52 AM   #3
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Ok so do you think 50% is pretty safe or should it be even less? I just remove the water, add dechlor per label into drained tank, and fill with tap water that is close to same temp.
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Old 03-25-2012, 02:57 AM   #4
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I routinely change that much on several of my tanks.
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Old 03-25-2012, 02:58 AM   #5
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Quote:
Originally Posted by WVDiscGolfer View Post
Ok so do you think 50% is pretty safe or should it be even less? I just remove the water, add dechlor per label into drained tank, and fill with tap water that is close to same temp.
That's exactly what I do every week with no issues. I dose prime for the entire tank volume not just what I'm replacing
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Old 03-25-2012, 07:23 AM   #6
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If the new water has the same GH, KH, TDS and temperature then go for as large a water change as you want.
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Old 03-25-2012, 12:13 PM   #7
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Ok thanks folks
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Old 03-25-2012, 12:15 PM   #8
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I regularly change 50-75 percent with no probs
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Old 03-25-2012, 02:53 PM   #9
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you can change that much if you want, and it's probably safe, but why do that much work and rack up your water bill? with a heavy planted and not overstocked tank you could probably get away with 25% per week.
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Old 03-25-2012, 03:32 PM   #10
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Also, if you have plants in the substrate you really don't need to worry about getting all the particles out of your substrate as mulm is good for the plants.
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Old 03-25-2012, 03:36 PM   #11
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some people might want gin clear water with no particles etc i do around 25% weekly with a large 1 once a month each 2 their own
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Old 03-25-2012, 08:30 PM   #12
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Quote:
Originally Posted by WVDiscGolfer View Post
I guess I'm operating under the assumption that as long as I'm still seeing particles being removed by my vac then why stop at 30% etc.
If you are changing out that much water every week primarily because you can see particles, have you considered increasing your filtration? It might end up visibly clearer and cleaner, and require less significant water changes. I put a 2213 on a 10 gallon. It looks dirtiest immediately after I replace the water because everything is stirred up. Within minutes it looks as good as it does a week later. I still do weekly water changes because I think it is best for the fish, not because it looks or tests like it needs it.
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Old 03-25-2012, 08:34 PM   #13
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Quote:
Originally Posted by Diana View Post
If the new water has the same GH, KH, TDS and temperature then go for as large a water change as you want.
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Old 03-25-2012, 08:52 PM   #14
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Use to do about 2,000g worth of water changes a week... 80-100% weekly.


gawd I'm glad I parted with all those big tanks!
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Old 03-26-2012, 04:04 PM   #15
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Quote:
Originally Posted by alfalfa View Post
If you are changing out that much water every week primarily because you can see particles, have you considered increasing your filtration? It might end up visibly clearer and cleaner, and require less significant water changes. I put a 2213 on a 10 gallon. It looks dirtiest immediately after I replace the water because everything is stirred up. Within minutes it looks as good as it does a week later. I still do weekly water changes because I think it is best for the fish, not because it looks or tests like it needs it.
i said that some people may prfer to do more there is no right and wrong here it is down to personal preference to be honest changing large amount of water in the correct manner is not exactly going to harm the fish
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