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Old 11-27-2011, 10:20 AM   #1
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If I had more filters in a tank does this mean it will be way cleaner and less water changes?
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Old 11-27-2011, 10:23 AM   #2
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Nothing will replace a water change. More filtration does help keep the tank clean, to a point, but you will *always* need to do water changes.
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Old 11-27-2011, 10:37 AM   #3
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Nothing will replace a water change. More filtration does help keep the tank clean, to a point, but you will *always* need to do water changes.
No but would it reduce how often I need to. And would it compensate for being overstocked
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Old 11-27-2011, 11:04 AM   #4
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How often do you do water changes now? What size tank and what's the stock?
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Old 11-27-2011, 11:09 AM   #5
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How often do you do water changes now? What size tank and what's the stock?
I do them once a week and if the nitrates are abnormally high I do 2 on the one day every week.
It's 240 litre Malawi cichlids.
And not currently overstocked I don't think?
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Old 11-27-2011, 11:13 AM   #6
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No but would it reduce how often I need to. And would it compensate for being overstocked
The need for water changes are usually determined by the nitrate levels. the amount of nitrate that will be produced is determined by the bioload in the tank. A large bioload means the nitrate level will rise more quickly between water changes. the actual level will determine how much needs to be changed.
All filters are nitrate factories, and it doesn't matter how many filters you add above the minimum to keep the ammonia and nitrite numbers at 0, you will still have the same nitrate number, decided by the bioload.
So, the extra filtration might prevent any spikes in ammonia or nitrite, but will do nothing to reduce the need for regular water changes or their size.
The high limit for nitrate that is bandied about is 40, below 20 would be better, and below 10, better still.
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Old 11-27-2011, 11:37 AM   #7
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I'm currently adding new plants weekly hopefully this will help with the nitrate levels.
What do you's think?
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Old 11-27-2011, 12:04 PM   #8
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Plants will definitely help. But it takes a heavily planted tank to have some impact on nitrates. My tank is still somewhat heavily planted and I get nitrates. So yes, while more filters and more plants will help, nitrates can't be taken away forever, so you need to do PWC.
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