Dosing HCL, post your experiences - Page 3 - The Planted Tank Forum
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post #31 of 60 (permalink) Old 04-08-2019, 11:05 PM Thread Starter
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Originally Posted by Greggz View Post
Man I hope you guys are taking the proper precautions and have the right type of facility to be working with HCL.



Here's Burr's lab to give an idea of what he is up to.........................................









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post #32 of 60 (permalink) Old 04-08-2019, 11:29 PM
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My local HD doesnít carry that, only this, which I believe is simply a lower concentration therefore less fumes as the advertisement states. Wish they would post the amount.

https://www.homedepot.com/p/Klean-St...5006/202690263

Thereís also an HDX brand muriatic acid for pools which is about 15% almost same price for 2 gallons, may be ďsaferĒ to handle. If this works well I may consider it.

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Interesting how even the manufacturer won't list what the HCL level is (<30%). I will concur, the Sunnyside Muriatic Acid does have a definite odor when you are adding it to water.
If you wish to use this process, I would suggest doing what I am doing - find an old 20g tank and do some experimenting to figure out how much of a KH drop you get for XX amount of product.
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post #33 of 60 (permalink) Old 04-08-2019, 11:50 PM
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LOL!

Proves that humor is always funniest when based in truth.

Looks to me like the correct gear you HCL guys should be wearing for water changes!
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post #34 of 60 (permalink) Old 04-08-2019, 11:55 PM
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Is there a limit? Say it takes 9 ml to get rid of 4 dKH in 10 gallons of water, would the concentration lead to toxicity for inhabitants or plants?


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post #35 of 60 (permalink) Old 04-09-2019, 12:14 AM
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@varanidguy - cannot answer that one.
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post #36 of 60 (permalink) Old 04-09-2019, 12:15 AM
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This is a very permanent drop in alkalinity.
Bicarbonates and/or carbonates will be removed.
Nothing like pH swings from CO2 injection.

Safety: try not to get it on you or your clothes.
Skin contact use water and rinse well immediately, key is don't wait to rinse it off.

Algaecide = no
That algae that died just took the hit from a reaction.

People use this in their pools all the time.

Glassware is best, plastic is okay.
Pipettes used to measure should be relatively new.
How many have had an old pipette fail and split on the seam?

Warning keep some KH behind or else the pH will plummet when all alkalinity is gone.
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Growing is not that difficult.
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post #37 of 60 (permalink) Old 04-09-2019, 12:19 AM
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Quote:
Originally Posted by Maryland Guppy View Post
This is a very permanent drop in alkalinity.

Bicarbonates and/or carbonates will be removed.

Nothing like pH swings from CO2 injection.



Safety: try not to get it on you or your clothes.

Skin contact use water and rinse well immediately, key is don't wait to rinse it off.



Algaecide = no

That algae that died just took the hit from a reaction.



People use this in their pools all the time.



Glassware is best, plastic is okay.

Pipettes used to measure should be relatively new.

How many have had an old pipette fail and split on the seam?



Warning keep some KH behind or else the pH will plummet when all alkalinity is gone.


What about if you already have relatively soft tap water and you want to use aquasoil without investing in an RO unit?


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post #38 of 60 (permalink) Old 04-09-2019, 12:21 AM
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Round 2 data:
6:00pm / 7.1pH / 5dKH - 6ml 32% HCL added to 20g water
6:05pm / 6.2pH / 3dKH
6:10pm / 6.2pH / 3dKH
6:15pm / 6.1pH / 3dKH
6:20pm / 6.1pH / 3dKH
6:30pm / 6.2pH / 3dKH
6:40pm / 6.3pH / 3dKH
6:50pm / 6.4pH / 3dKH
7:05pm / 6.7pH / 3dKH

Pretty cool process - would never have guessed it worked this easily.
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post #39 of 60 (permalink) Old 04-09-2019, 12:47 AM
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Bicarbonates and/or carbonates will be removed.
Not exactly, nothing is removed precipitated out, it just pushes the equilibrium towards Carbonic Acid.
Add Ammonia or another based and you will raise your kH.


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post #40 of 60 (permalink) Old 04-09-2019, 01:35 AM
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Carbonic acid (H2CO3) is unstable and decomposes to CO2 and H2O. Carbon in bicarbonates and bicarbonates off gases as CO2, so adding a base will raise the pH, but does not reverse the reaction to bring the KH back up.
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post #41 of 60 (permalink) Old 04-09-2019, 01:35 AM
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Not exactly, nothing is removed precipitated out, it just pushes the equilibrium towards Carbonic Acid.
Add Ammonia or another based and you will raise your kH.
Close enough, if I don't add it back KH remains low or gone.
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post #42 of 60 (permalink) Old 04-09-2019, 01:43 AM Thread Starter
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Not exactly, nothing is removed precipitated out, it just pushes the equilibrium towards Carbonic Acid.

Add Ammonia or another based and you will raise your kH.


Gassed out. The reaction quickly goes to CO2 which is released as a gas. HCO3- is CO2 dissolved in water.




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post #43 of 60 (permalink) Old 04-09-2019, 02:09 AM
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I always like it when the "Captain" is involved.
A chart and real data is provided, thanks @Immortal1
Reminds me of the ammonia consumption trial, that was impressive!

I'll have to give this a try now.

Starting with the quarterly WC 33G plant only tank.
It's not like I need the plants to grow any better.
If this helps them grow I will curse you all!
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post #44 of 60 (permalink) Old 04-09-2019, 03:46 AM
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Gassed out. The reaction quickly goes to CO2 which is released as a gas. HCO3- is CO2 dissolved in water.

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I wouldn't have thought it would all be gassed out but not sure never tried it.



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post #45 of 60 (permalink) Old 04-10-2019, 06:48 PM Thread Starter
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2 days ago was 24 hours after my first dose into my 20L, KH was 3. That was after 3 mL. I know my HCL concentration is lower than others less than 30% for sure. My KH may have also been higher and closer to 4 than 3 to start. I dosed 3 mL more in slow increments, to bring the total up to 6 mL. Last night I checked KH and itís down to 2. Last night I also dosed 1.5 mL and I think Iím going to stop there. From now on I will treat my tap water down to KH of 1 before water changes.

So far Iíve noticed some increased pearling overall, where I havenít seen much pearling at all before this. I am sure the lower overall pH is making some nutrients more available to plants. Color of macandra has also improved, new growth a bright pink. I have seen no change in the fuzzy green algae on old growth which I have been dealing with for a long time, Iím hoping as plants are healthier, this algae will also lessen. BBA has also lessened in the last week, I cannot attribute this to HCl since Iíve noticed a reduction even before I started lowering KH.


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