Ph discrepancy - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 08-26-2014, 06:47 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2008
Location: Central Florida
Posts: 22
Ph discrepancy

Hi,

I have 2 recently cycled tanks.

Tank 1. A 3 gallon heavily planted tank with Eco complete. Ph 8

Tank 2. 10 gallon lightly planted tank with driftwood, Mopani wood, petrified wood, black river rock, Eco complete. Ph 7.6

The water is aged tap water from the same source, with Prime added. PPS Pro fertilize used properly dosed. Ammonia and nitrites in the tanks are 0. Nitrates are low.

Am I right in assuming the difference in Ph is due to the stone or wood in Tank 2 .

Is the ph likely to be less stable in tank 2.

I want to provide a stable environment for the betta I plan to buy, and don't want the Ph bouncing around, especially when I do water changes in Tank 2 using tap water with the Ph of 8.
grouperkeys is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 08-26-2014, 08:21 PM
Algae Grower
 
yomon347's Avatar
 
PTrader: (0/0%)
Join Date: May 2014
Location: TX
Posts: 59
Yes, it is probably due to the wood. I would not worry about the pH unless you are trying to breed the betta. They are pretty indestructible.

55G High Tech, 3G High Tech, 3G Low Tech, 2.5G Low Tech, 5G Low Tech
yomon347 is offline  
post #3 of 6 (permalink) Old 08-26-2014, 08:21 PM
Planted Tank Guru
 
PTrader: (3/100%)
Join Date: Aug 2014
Location: Maryland, USA
Posts: 2,340
It is almost certainly the wood... Wood readily leaches acidic materials (ie: tannins) into the water.

Rocks/stones either don't affect pH at all, or raise it due to leaching carbonates (ie: limestone) into the water.

If there's enough buffer capacity in the water, neither of these will affect your pH much. However water without much buffering capacity is more easily swayed.

You mention the pH bouncing after water changes... Have you tested the pH after change, and does the pH change to be closer to 8? Does it go back down quickly or slowly?
mattinmd is offline  
 
post #4 of 6 (permalink) Old 08-26-2014, 09:40 PM
Planted Tank Guru
 
AquaAurora's Avatar
 
PTrader: (36/100%)
Join Date: Jul 2013
Location: north east cost US
Posts: 5,607
I agree that lowered pH would most likely be the wood. I have some manzanita wood in my 20g that leeched a lot of tannins making the water yellow and dropping the pH from 7.5 to nearly 6 over 2 weeks.
A great way to get rid of tannins and stop pH dropping is to boil the wood! If its too big to completely submerge in a pot of water to boil (mine was), rotate it! I did 1 hour boil, dump water, refill, rotate wood, repeat. No more tannins leaching, no pH flux for me!
Other options people use to get rid of tannins from wood include putting it in a dishwater for several cycles with no detergents(pt member 691175002 did this), or in the oven (low temp, and always keep an eye on it while its in there... wood does burn you know).

Due to photobuckets new bs cost for use of images on forums I have deleted all photobucket accounts. I apologize if you enjoyed or found my photos helpful.
Starting to update these threads

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
~
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
~
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
~
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
~
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
AquaAurora is offline  
post #5 of 6 (permalink) Old 08-26-2014, 10:14 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2008
Location: Central Florida
Posts: 22
Thank you all for your help.

I just measured the following: KH. 125
GH 197

I guess the water has enough buffering capacity.

I re tested the ph and had a friend help me compare the colors on the master test kit chart. Some of the colors are so close that it gets confusing.
The swings may not be as dramatic as I thought, but I'm not certain. Maybe I should buy an electronic ph monitor to be sure.

Or do you all think that I'm over worrying it???

Oh, and I must have boiled the wood 8 times. Tannin still came out of it, but not as much.
grouperkeys is offline  
post #6 of 6 (permalink) Old 08-26-2014, 11:14 PM
Planted Tank Guru
 
discuspaul's Avatar
 
PTrader: (0/0%)
Join Date: Jul 2010
Location: British Columbia, Canada
Posts: 3,402
I don't believe you have anything to be concerned about. As others have said, the wood in the one tank will maintain the pH at a slightly lower level than in the other.
discuspaul 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