New Tank Parameters - The Planted Tank Forum
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post #1 of 12 (permalink) Old 02-03-2020, 10:34 PM Thread Starter
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New Tank Parameters

Approximately 2 weeks old now. 20 gallon long

GH-0ppm
KH-180ppm
pH- 7.9
Ammonia-0
NO2-0
NO3-0

All seems well except for pH right? What can a high pH do to my plants? (anubias, Val, Crypt Wendtii, bacopa, dwarf grass)
My oto's (3) seem to be doing good. Plants seem like they are wanting to fade a little but I heard that is a normal die off at the beginning of a tank.
Any advice will be helpful. Thanks!
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post #2 of 12 (permalink) Old 02-03-2020, 10:41 PM
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How do you have 0gh but 180ppm kh? Something seems off. pH seems right for your kh.

If you really have 0gh then your plants are going to suffer. I would double check your test kits with known samples first before you do anything else though.

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post #3 of 12 (permalink) Old 02-03-2020, 10:51 PM Thread Starter
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I am using a test strip and I checked again. gH is definitely no more than 30. What numbers should I be wanting in the tank? How can I increase that number?

Last edited by RocksBucks; 02-03-2020 at 10:51 PM. Reason: spelling error
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post #4 of 12 (permalink) Old 02-03-2020, 10:57 PM
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I had much higher KH and PH to match. Learned the only way to get it back down is RO. Then I remineralization to get GH back to 4 from zero. And add tap water to get KH up to about the same (4).

So if you want to fight the PH down I think you’ll have to battle the KH and the PH should follow suite.

I’m sure one of these other more experienced water chemists will chime in.

Also get some API liquid test kits for hardness.
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post #5 of 12 (permalink) Old 02-03-2020, 11:13 PM
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Yeah, test strips are not good for actual numbers. They can show you that something has changed over time or give you a general ball park of what's going on but don't use for accurate results.

Gh you will want to shoot for 50-100ppm. I use Seachem Equilibrium with great success.

I'll just say that, usually, if your kh is high. So is your Gh. So having your Gh so much lower than kh seems off to me.

Before adding anything. Get a more accurate test kit so you know what you are dealing with.

As stevewb said, API is a good choice.

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post #6 of 12 (permalink) Old 02-03-2020, 11:19 PM Thread Starter
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Quote:
Originally Posted by stevewb View Post
I had much higher KH and PH to match. Learned the only way to get it back down is RO. Then I remineralization to get GH back to 4 from zero. And add tap water to get KH up to about the same (4).

So if you want to fight the PH down I think youíll have to battle the KH and the PH should follow suite.

Iím sure one of these other more experienced water chemists will chime in.

Also get some API liquid test kits for hardness.
Yea I am ordering the test now for sure. Thank you for your advice.

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Quote:
Originally Posted by pauld738 View Post
Yeah, test strips are not good for actual numbers. They can show you that something has changed over time or give you a general ball park of what's going on but don't use for accurate results.

Gh you will want to shoot for 50-100ppm. I use Seachem Equilibrium with great success.

I'll just say that, usually, if your kh is high. So is your Gh. So having your Gh so much lower than kh seems off to me.

Before adding anything. Get a more accurate test kit so you know what you are dealing with.

As stevewb said, API is a good choice.

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I will order the test today so hopefully I get a better number soon. Thank you!
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post #7 of 12 (permalink) Old 02-03-2020, 11:23 PM
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I will order the test today so hopefully I get a better number soon. Thank you!
Good call. Post results I’m curious.
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post #8 of 12 (permalink) Old 02-07-2020, 05:02 AM Thread Starter
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Good call. Post results Iím curious.
So the GH and KH API test kit came in today. It took 11 drops to change the color from blue to yellow for the KH and took only 2 drops for the color to go green (I didnt even get to see the orange color).

This is me checking the hardness about 2 hours after doing a 25% water change.

My otos look like they are doing well but my plants, except for my cardinals, look like they are suffering.

I am using Prime and Flourish when I do my water changes. About 2 times a week right now.

Im gonna test tomorrow as well to see if the tank makes things look better over some time.

I hope this isnt gonna be a big issue. Any concerns or comments much appreciated.
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post #9 of 12 (permalink) Old 02-07-2020, 06:48 AM
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Well, atleast you have some Gh in there.

Fyi, I recently switched from ~70ppm Gh to ~100ppm Gh and noticed a difference.

Maybe shooting for a value on the higher side would be beneficial, especially since your kh is so high.

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post #10 of 12 (permalink) Old 02-07-2020, 08:04 AM
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Do you have a whole house water softener?
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post #11 of 12 (permalink) Old 02-07-2020, 03:12 PM Thread Starter
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Quote:
Originally Posted by pauld738 View Post
Well, atleast you have some Gh in there.

Fyi, I recently switched from ~70ppm Gh to ~100ppm Gh and noticed a difference.

Maybe shooting for a value on the higher side would be beneficial, especially since your kh is so high.

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Quote:
Originally Posted by DaveKS View Post
Do you have a whole house water softener?
How do I raise my GH? Is it just RO water?

I do not have a whole house water softener. I get it how it is from the city. I’m renting so I definitely don’t want to repipe anything.
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post #12 of 12 (permalink) Old 02-07-2020, 10:19 PM
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RO brings your KH and GH down to, ideally, zero. You then add GH back however you choose. I use NilocG GH booster. I add some tap water to bring my KH up just a little as well
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