A bit confused -- maintaining GH/KH without build-up of K

SaltyNC

Junior Poster
Jul 27, 2012
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My well water is very soft. I have TDS of around 40 ppm from the tap, and my GH is somewhere between 1 to 2 and KH around 2. I don't have highly accurate test equipment, but this is as measured by both Sera wet GH and KH test kits and also a strip test. The TDS reading is from an inexpensive TDS meter from the auction site. Still, everything seems to be giving about the same picture -- very soft water, and this is in line with the USGS water hardness map for my area.

I was having some plant issues in my aquarium, and it was recommended I increase GH, and I was recommended Kents RO Right and Seachem Equilibrium. My aquarium is a 6.6 gallon nano aquarium, and I am doing weekly water changes, so I must continually mineralize my tap water much as if it were RO water to bring it to around 5 GH. I started with Kent's RO Right, but after digging into Kent's RO Right ingredients, I discovered it contains a large quantity of table salt and a very tiny amount of Ca and Mg, so I decided to try Equilibrium, and then I realize that to raise my GH and KH to preferred levels, I'm beginning to push my potassium to high levels due to Equilibrium's potassium content. I was already dosing K as part of EI, but that is surely not necessary if I continue to use SC Equil.

Can I keep using something like Equilibrium over a long period of time without problems? If I get my tank water to 5 GH and I remove 50% of the water and replace with 5 GH water that has been raised 3 dH by Equilibrium, does that mean that the GH and K will never increase but will remain the same? Is there a better way or better products I should be using?

I'm such a newb, I thought it would be great to use Wet's calculator to produce a solution of Equilibrium that I could simply squirt one pump into a gallon of water to raise the GH 3dH. You guys with more experience probably already see the problem. Each squirt is 1.75 mL. The bottle is 400 mL. Of course, that exceeded the solubility by a long shot. Maybe it wouldn't dissolve at all, but I can't even keep all those minerals in suspension. It's rough being a newb, but each hard lesson learned certainly is remembered.

Thanks for any help, guys! I appreciate it.
 

Tom Barr

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Jan 23, 2005
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I use GH booster for my tap which is very soft.
I add about 1 teaspoon per 60 gal 1x a week.
This is enough for most any adn every plant.

GH booster is a cheaper alternative to the name brand products.

FYI, if you do say 50% weekly water changes, the amount possible for build up cannot exceed 2x the dosing rate for that week.

Say you dose 10 ppm of K+. The max build up possible will be 20ppm doing 50% water changes with no K+ coming from the tap water.
It'll be even lower if you do larger water change or more frequent water changes.
 

barbarossa4122

Guru Class Expert
Dec 29, 2009
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Tom Barr;86403 said:
I use GH booster for my tap which is very soft.
I add about 1 teaspoon per 60 gal 1x a week.
This is enough for most any adn every plant.

GH booster is a cheaper alternative to the name brand products.

FYI, if you do say 50% weekly water changes, the amount possible for build up cannot exceed 2x the dosing rate for that week.

Say you dose 10 ppm of K+. The max build up possible will be 20ppm doing 50% water changes with no K+ coming from the tap water.
It'll be even lower if you do larger water change or more frequent water changes.

Hey Tom,

I also have very soft water here in NYC. Just want to make sure you said one teaspoon/60g with water change.
 

Tom Barr

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Jan 23, 2005
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This dosing is fine for the soft water tanks/tap water.
 

Tom Barr

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Jan 23, 2005
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barbarossa4122;89394 said:
..........but a bit more will not hurt, right ?
Thanks Tom.

Not at all, might be even better. I add just enough basically, it's on the lower end, mostly out of curiosity, I use to have high GH's and want to explore the lower ranges.
People have said often that they think they have Ca++ deficiencies, but even with very low GH tap water, low dosing, I've never seen anything.

You tend to have better colors as the GH increases.
Just need to be sure there's ample Mg and Ca, not just Ca.
 

barbarossa4122

Guru Class Expert
Dec 29, 2009
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NYC
Tom Barr;89440 said:
Not at all, might be even better. I add just enough basically, it's on the lower end, mostly out of curiosity, I use to have high GH's and want to explore the lower ranges.
People have said often that they think they have Ca++ deficiencies, but even with very low GH tap water, low dosing, I've never seen anything.

You tend to have better colors as the GH increases.
Just need to be sure there's ample Mg and Ca, not just Ca.

Thank you Tom.
 

HunterX

Junior Poster
Sep 15, 2012
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Springfield, MO
What is GH Booster

Hey Tom,

I recently moved and the water at my new house has hardly any GH or KH. GH is 1 and KH is 0. This is about 200 though. I have tested it several times to confirm the readings. I also tested water after adding MMS for my shrimp tank and the GH does increase accordingly. So I'm assuming my test is ok.

I don't want to put MMS in my 55 gallon tank. It's just cost prohibitive.

What is the GH booster that you were talking about? Will it help the KH also or maybe a more correct question would be do the plants need the KH?

Thanks in advance for your response.
 
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