Well Well Well water Nitrates!!

aes1687

Jack Dempsey
MFK Member
Feb 16, 2018
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Indonesia - California
Hello from Indonesia MFK.

Here in Indonesia, the culture of checking water parameters are not really there. The common knowledge is just to do regular water changes and filter cleanings, and your fish will be fine. And growing up, that was exactly what my Dad did. We have over 10 years of fish keeping experience without testing water parameters and it seemed to be fine. After moving to the States for my studies, I started seeing more and more people use test kits and I recently bought my own test kit. Now that I am home, I tested the water parameters all around the house, starting from the tap, which was from the well, and my aquariums and ponds.

The readings were quite surprising. The tap water itself already had about 40ppm of nitrates. And for all my setups, the nitrates were sky-high, at about 160ppm for nitrates. The water was acidic and had between 0-40ppm of alkalinity. Nitrites and Ammonia were not present. So from there, I assumed that after all the years of fish keeping, the waters always had high nitrates and the fish seemed about fine.

Now my questions are:
1. Are nitrates really that bad if you have enough biological filtration to keep up with the nitrogen cycle? Even after 70% water changes the nitrates are high.
2. How do people maintain super-low nitrates in their non-planted setups? My pond already has plants but nitrates are still high.
3. What can be used to increase pH and alkalinity?


Using Reverse Osmosis Water isn't really an option. I did some research but could not find much on maintaining nitrates specifically. I saw some media that supposedly helped but it looked like regular biological media.

I would greatly appreciate any information given for my learning.
 
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kno4te

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Nitrates are the end product of the aquarium cycle. Only way to be removed is water changes, dilution, chemically, or biologically. So do more water changes, add ro water, nitrosorb media, algae scrubber, plants that grow quick to eat up nitrates or denitrator (deep sand beds and slow trickle) which is hard to keep up and hit or miss on effectivety. Those I imagine are ur only options that I can think of now.
 

twentyleagues

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So it sounds like more water changes are needed. But even if you do more the best you could hopefully achieve is 40ppm nitrate. Some people's standards that's not bad and people run tanks like that all the time.

Increase in pH and alk can be achieved a few ways but the best would be to use crushed coral in your filter or tank it self. As for nitrates ro would be best at removal. The nitrates themselves can be driving down your pH and alk. Plants that remove nitrates the best are fast growing and it helps to have plants that are taking nutrients out of the water but have leaves in the air. All plants need co2 it's easier/faster for plants to take co2 out of air so they grow faster. Faster growth = more nutrients needed. Plants that are in the water will remove nitrates also. With a pond or a fish tank you can build a "bog" filter to help remove nitrates. Bog filters have plants that are rooted in a substrate that is flooded with tank/pond water and they consume nitrates. There are a ton of them but you'll need to check what's available in your area and what you can set up. Pothos is a plant found in most countries that can and will grow with roots in water. It's a fast grower too with little demand. Peace lily is another one. Nicely set up bog filters can enhance the look of a pond and sometimes even rival the pond itself. In an aquarium you can easily setup an overhead plant filtration system that will look nice and provide the same type of nitrate removal. Floating plants work great too like water lettuce, frog bit, and even the dreaded duck weed. Duck weed is the devil though.
 

aes1687

Jack Dempsey
MFK Member
Feb 16, 2018
65
28
36
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Indonesia - California
Nitrates are the end product of the aquarium cycle. Only way to be removed is water changes, dilution, chemically, or biologically. So do more water changes, add ro water, nitrosorb media, algae scrubber, plants that grow quick to eat up nitrates or denitrator (deep sand beds and slow trickle) which is hard to keep up and hit or miss on effectivety. Those I imagine are ur only options that I can think of now.
Thank you for your input! greatly appreciated. One setup for example is my stingray setup. I have one 2month old motoro stingray pup in a 15 gallon growout all by herself. I do 50% water changes every 2-3 days and I find that the nitrates are still super high the same with my other 120 gallon tanks that I do 50% water changes every 2 weeks.
 

aes1687

Jack Dempsey
MFK Member
Feb 16, 2018
65
28
36
23
Indonesia - California
So it sounds like more water changes are needed. But even if you do more the best you could hopefully achieve is 40ppm nitrate. Some people's standards that's not bad and people run tanks like that all the time.

Increase in pH and alk can be achieved a few ways but the best would be to use crushed coral in your filter or tank it self. As for nitrates ro would be best at removal. The nitrates themselves can be driving down your pH and alk. Plants that remove nitrates the best are fast growing and it helps to have plants that are taking nutrients out of the water but have leaves in the air. All plants need co2 it's easier/faster for plants to take co2 out of air so they grow faster. Faster growth = more nutrients needed. Plants that are in the water will remove nitrates also. With a pond or a fish tank you can build a "bog" filter to help remove nitrates. Bog filters have plants that are rooted in a substrate that is flooded with tank/pond water and they consume nitrates. There are a ton of them but you'll need to check what's available in your area and what you can set up. Pothos is a plant found in most countries that can and will grow with roots in water. It's a fast grower too with little demand. Peace lily is another one. Nicely set up bog filters can enhance the look of a pond and sometimes even rival the pond itself. In an aquarium you can easily setup an overhead plant filtration system that will look nice and provide the same type of nitrate removal. Floating plants work great too like water lettuce, frog bit, and even the dreaded duck weed. Duck weed is the devil though.
I have never heard of the bog filter and will look more deeply into it. Thank you. Also, I use to keep a lot of water lettuce in my pond but my giant gouramis and pacus just keep eating them so I kind of gave up on that. I am considering those plants for my aquarium but my aquariums are all indoors and I'm not sure if the plants would survive indoors.
 
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twentyleagues

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I have never heard of the bog filter and will look more deeply into it. Thank you. Also, I use to keep a lot of water lettuce in my pond but my giant gouramis and pacus just keep eating them so I kind of gave up on that. I am considering those plants for my aquarium but my aquariums are all indoors and I'm not sure if the plants would survive indoors.
They will given enough lighting.
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Luke tomkinson

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omg AND THE STINGRAY WAS HEALTHY IN THAT?? jeez i reckon youll be fine as your dad and you had been keeping fish like that for 10 years and even sensetive fish like stingrays they will proably all be accustumed to it in indonesia
 

kno4te

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I have never heard of the bog filter and will look more deeply into it. Thank you. Also, I use to keep a lot of water lettuce in my pond but my giant gouramis and pacus just keep eating them so I kind of gave up on that. I am considering those plants for my aquarium but my aquariums are all indoors and I'm not sure if the plants would survive indoors.
They will survive. Get some easy to grow plants. Not requiring lots of light and not requiring co2. Even with cheap lighting and low PAR they’ll grow.
 

aes1687

Jack Dempsey
MFK Member
Feb 16, 2018
65
28
36
23
Indonesia - California
omg AND THE STINGRAY WAS HEALTHY IN THAT?? jeez i reckon youll be fine as your dad and you had been keeping fish like that for 10 years and even sensetive fish like stingrays they will proably all be accustumed to it in indonesia
I know right? Thats why I started wondering whether or not nitrates are THAT bad. The stingray has been going strong. I am assuming its accustomed to the water parameters mainly because it was bred here locally. It and its parents must have been living in similar water parameters its whole life so Im guessing it should be fine. Knowing they are sensitive I still do water changes every 2-3 days just in case.
Other sensitive fish that Im keeping that also seem to be doing well are Forskahlii tigerfish and an RTG arowana
 
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