Water changes- how often? - The Planted Tank Forum
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post #1 of 51 (permalink) Old 02-29-2016, 11:58 PM Thread Starter
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Water changes- how often?

How often do you do water changes on your planted tanks? Is it dependant on amount of dosing,plant load, fish load, filtration etc? Or just do one regardless to replenish what needs to be replenished. How often and how much? Looking for a general consensus. Thanks in advance.
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post #2 of 51 (permalink) Old 03-01-2016, 12:43 AM
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IMO & E., for properly maintaining any planted tank, and ensuring healthy & thriving fish, generally speaking the more frequent, and larger the water changes, the better. Primarily prevents the development of unhealthy conditions due to accumulation of wastes in these limited spaces, and replenishes needed mineral content for the benefit of livestock & plants. Smaller tanks, say under 100 gallons, will do well from receiving weekly wcs of 50% or more.
Many may argue that far less frequent wcs will suffice in a well-kept, balanced aquarium environment, but that is seldom the case in our busy lives, so the infusion of fresh new water will be always be a much acceptable mitigating approach.
It has also been shown many times over, that the higher the bio-load, the more reason there is to accelerate the frequency & quantity of wcs.
That's my .02 cents.
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post #3 of 51 (permalink) Old 03-01-2016, 12:49 AM
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High tech 50% weekly, low tech shrimp 15% every other week.
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post #4 of 51 (permalink) Old 03-01-2016, 12:59 AM
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Hi tek, low light, 50% change every 7-10 days.

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post #5 of 51 (permalink) Old 03-01-2016, 01:24 AM Thread Starter
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Thanks alot. I was thinking of 50 % at least every 10 days. I'll give that regimen a go.
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post #6 of 51 (permalink) Old 03-01-2016, 10:51 AM
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High tech medium light, low bioload. When the glass starts turning green, so 3-4 weeks 50%. Works for me
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post #7 of 51 (permalink) Old 03-01-2016, 11:58 AM
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60% every sunday, no exceptions. Just what I do.

A 17-year old that faces parental opposition in this hobby

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post #8 of 51 (permalink) Old 03-01-2016, 12:03 PM
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+one^
Makes no matter,is same for year's.
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post #9 of 51 (permalink) Old 03-01-2016, 12:11 PM
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I do 25% water change every week on my lightly stocked tanks, my tanks with fry I do two 25% water changes a week.
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post #10 of 51 (permalink) Old 03-01-2016, 01:42 PM
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40% weekly regardless of lighting.... had a nasty experience with a 50% change where the silicone at the top of the tank gave way... so now I'm superstitious about 50.

Cape Town, South Africa.

Hi. I'm back.
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post #11 of 51 (permalink) Old 03-01-2016, 02:28 PM
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Medium tech, every week 10%, but this tank is going without restart for 6 years, so I know it well. On the other hand, in my outgrow tank I'm doing 2-3 25% water changes every week.
Edit: it's good to start even with 50% and later on try smaller and smaller water changes.


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post #12 of 51 (permalink) Old 03-01-2016, 02:33 PM
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If more water changes is better than why changing 90% tap water daily makes plants sick?


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post #13 of 51 (permalink) Old 03-01-2016, 02:41 PM
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Quote:
Originally Posted by Edward View Post
If more water changes is better than why changing 90% tap water daily makes plants sick?
CO2 fluctuations
Big Temp changes
Removal of beneficial nutrients
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post #14 of 51 (permalink) Old 03-01-2016, 02:59 PM
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ADA Aquasoil user's change lot's of water initially, with no harm to plant's. NO?
Who changes 90% daily?
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post #15 of 51 (permalink) Old 03-01-2016, 03:19 PM
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I have done changes from 10% to 90% and have yet to see any harm to fish or plants that could be attributed to the water changes. Right now I am on a 50% every 2 weeks schedule, with a non-CO2, low medium light tank, with medium planting density and low fish load. I chose this because of my low NPK dosing, allowing me to not worry about build-up in NPK in one week.

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Quote:
Originally Posted by Edward View Post
If more water changes is better than why changing 90% tap water daily makes plants sick?
Is this something you have seen consistently? Or, just once, or just as reported by someone, or as reported by several others? I haven't heard this before.

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