Water changes - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 09-17-2016, 02:19 PM Thread Starter
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Water changes

Hey guys, do I need to keep doing water changes even if ammonia, nitrite and nitrate are in 0?. I did a 20% water change last week. I have a 7.5 g planted tank.
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post #2 of 8 (permalink) Old 09-17-2016, 02:24 PM
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Yes, it's a good idea, there are other things that build up in tanks (pheremones, disolved organics,etc) that we can't really test for, and there are things that become depleted (macro and micro nutrients, etc) , again that we can't test for. water changes help to keep those things in balance. It's also a good habit to be used to in case nitrates (or others) ever become an issue


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post #3 of 8 (permalink) Old 09-17-2016, 02:30 PM Thread Starter
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Cool thanks. Weekly or biweekly?
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post #4 of 8 (permalink) Old 09-17-2016, 05:58 PM
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Cool thanks. Weekly or biweekly?
That depends on a lot of things like stocking levels, plant mass, your specific water chemistry. Honestly, I'd start with once or twice a week of small changes until you get more familiar with your tank

If you are dosing ferts, then I'd follow those directions.
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post #5 of 8 (permalink) Old 09-17-2016, 06:13 PM
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20-25% water change a week is a pretty good rule of thumb for starters IMO, keeps parameters stable for critters that like that but also is enough to minimize the effect of things that build up over time. If you're dosing EI or stocking something that makes a lot of waste (like goldfish) or needs really pristine water (like discus) you should be changing more.
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post #6 of 8 (permalink) Old 09-20-2016, 08:21 PM Thread Starter
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I use flourish excel. I have 6 white clouds and about 10 rcs
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post #7 of 8 (permalink) Old 09-21-2016, 01:14 AM
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Water changes are essential for keeping a healthy tank. If you opt to do less water changes then make sure you top off the water in your tank.

You do not need to do water changes if you are not doing a lot of fertilizers. Depending on the critters (fish vs. shrimp), sometimes stable water parameters meaning less water changes are required.

If you have good stable water chemistry then you can do less water changes. This requires testing and careful fertilization. Usually once you get a routine for dosing then you can get good control of the nutrient levels.


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post #8 of 8 (permalink) Old 09-23-2016, 04:09 PM
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Water changes are essential for keeping a healthy tank. If you opt to do less water changes then make sure you top off the water in your tank.

You do not need to do water changes if you are not doing a lot of fertilizers. Depending on the critters (fish vs. shrimp), sometimes stable water parameters meaning less water changes are required.

If you have good stable water chemistry then you can do less water changes. This requires testing and careful fertilization. Usually once you get a routine for dosing then you can get good control of the nutrient levels.
Just adding water can be detrimental. If it's the same tap water and not distilled or RO you are concentrating the minerals in the tank.

One thing I have found is water is anything but stable. The tank water is always changing. Fish are always adding ammonia. Plants are always taking out nutrients. I've kept tanks successfully without changes. Just adding water. But it was a lot of work in the beginning. I mean from the initial setup. Then it was a dirted heavily planted lightly stocked tank.

Water changes bring things back into balance. Mostly.

Years ago as an experiment I kept two identical fish only tanks. Same gravel. Same lack of water changes. Same feeding amounts. (weighed) Same everything. And while you would expect the parameters to be identical they weren't.

Dilution is the solution for the pollution.
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