Kh and Gh - The Planted Tank Forum
 4Likes
  • 2 Post By rzn7z7
  • 2 Post By madcrafted
  • 4 Post By OVT
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 05-10-2018, 10:54 PM Thread Starter
Algae Grower
 
Reedfish's Avatar
 
PTrader: (0/0%)
Join Date: Sep 2017
Posts: 6
Kh and Gh

Hey y'all,

So I'm learning (the hard way) how to do a planted tank. I have an RO system because my tap water is terrible. Fish are doing great -- plants are not! And as I'm learning more, I realize Gh and Kh are important for my fish too.

I found a Gh stabilizer (Seachem Equilibrium) to handle the general hardness but I've read mixed reviews about Kh. Some say add baking soda and some say to avoid it. I don't want to add coral to my filter if I can avoid it because I can't control the amount. Is there anything that works for Kh? I found Calcium Carbonate but then I heard you need Bicarbonate...

I'm confused! Any help would be appreciated! <3
Reedfish is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 05-11-2018, 12:36 AM
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2013
Location: Michigan
Posts: 38
Sodium bicarbonate (baking soda) is inexpensive and may be used to raise KH, but it will introduce sodium into your tank and for that reason some people (including myself) avoid it. Alternatively you can use potassium carbonate or (what I use) potassium bicarbonate

I've never used calcium carbonate
Reedfish and Reedfish like this.
rzn7z7 is offline  
post #3 of 9 (permalink) Old 05-11-2018, 12:39 AM
Planted Tank Enthusiast
 
PTrader: (0/0%)
Join Date: Dec 2017
Posts: 831
Nothing wrong with using baking soda. The amount of sodium isn't going to kill your plants or harm livestock. You only need to raise KH a few degrees at most. You could always use potassium bicarbonate too. Either is fine, or use a mix of both. Crushed coral (aragonite), oyster shell grit, egg shells, etc, are all forms of calcium carbonate that will raise your KH. Certain stones like seirya also leech calcium carbonate. How much and how quickly will depend on how acidic your water is and how frequently you change out the water. It's fine to use various forms of calcium carbonate for long term buffering but if you need a quick boost... arm and hammer is your friend.
Reedfish and Reedfish like this.
madcrafted is offline  
 
post #4 of 9 (permalink) Old 05-11-2018, 01:26 AM
OVT
Carpe Diem
 
OVT's Avatar
 
PTrader: (144/100%)
Join Date: Nov 2011
Location: NorCal
Posts: 7,478
Here is a good introduction into the subject https://www.advancedplantedtank.com/ph-kh-gh-tds.html.
OVT is online now  
post #5 of 9 (permalink) Old 05-12-2018, 09:19 PM Thread Starter
Algae Grower
 
Reedfish's Avatar
 
PTrader: (0/0%)
Join Date: Sep 2017
Posts: 6
Thanks, y'all!

I'll look into the potassium bicarbonate for the long term and use the baking soda for now. I found calcium carbonate on Amazon and ordered some of that. You guys are the best
Reedfish is offline  
post #6 of 9 (permalink) Old 05-13-2018, 05:42 AM
Algae Grower
 
PTrader: (0/0%)
Join Date: Dec 2017
Posts: 39
Calcium carbonate is very insoluble, you will find a hard time to dissolve it completely into your water. You can use sodium bicarbonate, sodium isnt an issue in such amounts needed to raise kH to a few degrees. For 2 °dKH for instance, you will add only 16.4 ppm of sodium. Sodium becomes a problem over 100 ppm.
SamuelLG is offline  
post #7 of 9 (permalink) Old 05-13-2018, 06:30 AM
Algae Grower
 
Subconfish's Avatar
 
PTrader: (0/0%)
Join Date: May 2018
Posts: 50
I would suggest a substrate to keep ur kh. I've always had problems adjusting kh every time you perform a water change because you'll have to measure it Just a bit annoying imo. Crush coral, oyster as stated above +1
Subconfish is offline  
post #8 of 9 (permalink) Old 05-18-2018, 09:17 PM Thread Starter
Algae Grower
 
Reedfish's Avatar
 
PTrader: (0/0%)
Join Date: Sep 2017
Posts: 6
OVT, this link is AWESOME. Thank you!

Bump: OVT, this link is AWESOME. Thank you!
Reedfish is offline  
post #9 of 9 (permalink) Old 05-18-2018, 09:32 PM
Wannabe Guru
 
dukydaf's Avatar
 
PTrader: (0/0%)
Join Date: Dec 2004
Location: Rome
Posts: 1,273
I agree with @madcrafted , sodium bicarbonate works fine. Many times, people in this hobby tend to blame fertilizers and parameters for the lack of maintenance given to aquariums. If I think about it, pretty much every nutrient was blamed for problems with plants over the last 30 years.

Good that being said, check the requirements of the fish /shrimp. They will dictate what KH and GH you need. When CO2 is good plants do not care about 0 KH, but for peace of mind and beginners most keep a KH of 3. GH of 6 and above should be good enough for plants and the large majority of fish in the hobby.

Carbonate will be converted to bicarbonate at the normal pH range for aquariums.

On hiatus till later this year
dukydaf is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome