Mg defieciency,possible? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 07-18-2005, 07:59 AM Thread Starter
Guest
 
PTrader: (0/0%)
Join Date: Feb 2005
Posts: 133
Mg defieciency,possible?

I have reasons to believe a Mg defieciency in my tank,here are some symptoms,
Hygrophilla corymbosa after growing slightly looses the larger leaes and replaces them with new ones.They turn yellow and seem to 'decompose'.
Hygrophilla polysperma grows sideways and cabomba looks a bit pale.On the other hand my hygrophilla diformis looks perfectly healthy and grows quickly.
I don't know what to suspect,I have been usind the PPS method for dosing whith high doses of all nutrients that the aquarium utilised completely.Although I don't make water changes often and never added Mg.This is why I suspect Mg defieciency.If all other nutrients are utilised in such a rythm where do plants get their Mg from?It's been over a month since my last water change( water change=way to add Mg to tank)

Thanks

PS:No iron defieciency
Phil is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 07-18-2005, 08:30 AM
Algae Grower
 
PTrader: (0/0%)
Join Date: Jun 2004
Location: Hong Kong
Posts: 115
I would simply start carrying out regular water changes to test the theory. In fact, if you dose heavily, that's what you should do.

Eheim pimp club #48
Specs:
800L 100% Flourite
80L plant/shrimps nursery tank inconnected with the main tank
Total 600W HQI, 2 X 5200K 2 X 6500K
Eheim 2028 X 2 2080 X 1
Dupla Substrate Heater
Dupla S external reactor
Aquamedic 2hp & Teco R15 400W chillers
Sega pH Controller

Light period: 6 hours on each bulb across 12 hours
Water Parameters: pH 6.4, KH 2, GH 1, NO3 40, PO4 1 TDS 250
macbrush is offline  
post #3 of 9 (permalink) Old 07-18-2005, 08:54 AM Thread Starter
Guest
 
PTrader: (0/0%)
Join Date: Feb 2005
Posts: 133
I don't dose heavily,What I am doing is dosing the right quantities of the right macronutrients,keeping them at optimal levels for a prolonged time but without waterchanges and without adding any Mg.So common since tells us that Mg will run out eventually.Does this sound reasonable?The tank is highlight and very heavily planted.
Phil is offline  
 
post #4 of 9 (permalink) Old 07-18-2005, 09:33 AM
Algae Grower
 
PTrader: (0/0%)
Join Date: Jun 2004
Location: Hong Kong
Posts: 115
Nutrient deficiency can look very similar to each other, and often that a deficiency of A can lead to and look like a deficiency of B. I guess there is only one way to find out, either start dosing Mg, or start water changes. I would definitely start water changes right away. Do you know your GH?

Eheim pimp club #48
Specs:
800L 100% Flourite
80L plant/shrimps nursery tank inconnected with the main tank
Total 600W HQI, 2 X 5200K 2 X 6500K
Eheim 2028 X 2 2080 X 1
Dupla Substrate Heater
Dupla S external reactor
Aquamedic 2hp & Teco R15 400W chillers
Sega pH Controller

Light period: 6 hours on each bulb across 12 hours
Water Parameters: pH 6.4, KH 2, GH 1, NO3 40, PO4 1 TDS 250
macbrush is offline  
post #5 of 9 (permalink) Old 07-18-2005, 10:22 AM Thread Starter
Guest
 
PTrader: (0/0%)
Join Date: Feb 2005
Posts: 133
Actually I added MgSo4 last night to raise my GH from 10 to 13.Perhaps I overdosed a bit.
Phil is offline  
post #6 of 9 (permalink) Old 07-18-2005, 11:25 AM
Planted Tank Enthusiast
 
KevinC's Avatar
 
PTrader: (6/100%)
Join Date: May 2004
Location: Oshkosh, WI
Posts: 738
Your starting Mg level would also play a role in how fast it disappears. What is your tap water Mg level? Mine is only 2ppm, so I dose Epsom salts with every water change. Mg will be slowly removed as the plants grow - it is the center atom in the chlorophyll molecule. It is removed very slowly compared to other nutrients though. Can't hurt to add a little.

Kevin

Kevin

72g bowfront planted, CO2, 4x - T5HO, Eheim 2213 and 2217, 2 angels, pristella tetras, blue tetras, betta, albino bristlenose pleco, albino cories. Sword, vals, hygros, ludwigias, java moss and fern, anubias

2g Mac-quarium. Clown gravel, fluorescent plastic plants, and 2 guppies.
KevinC is offline  
post #7 of 9 (permalink) Old 07-18-2005, 03:04 PM
Algae Grower
 
PTrader: (0/0%)
Join Date: Jun 2004
Location: Hong Kong
Posts: 115
Is there any particular reason for that you don't want to do regular water changes?

Eheim pimp club #48
Specs:
800L 100% Flourite
80L plant/shrimps nursery tank inconnected with the main tank
Total 600W HQI, 2 X 5200K 2 X 6500K
Eheim 2028 X 2 2080 X 1
Dupla Substrate Heater
Dupla S external reactor
Aquamedic 2hp & Teco R15 400W chillers
Sega pH Controller

Light period: 6 hours on each bulb across 12 hours
Water Parameters: pH 6.4, KH 2, GH 1, NO3 40, PO4 1 TDS 250
macbrush is offline  
post #8 of 9 (permalink) Old 07-18-2005, 03:07 PM
Planted Tank Guru
 
plantbrain's Avatar
 
PTrader: (267/100%)
Join Date: Dec 2003
Location: The swamp
Posts: 13,609
sounds like NO3, not Mg, Mg deficency is rather rare, it'll occur certainly if done on purpose, but I've not found it to be widespread and rather tough to pinpoint with certainty.

Either way, adding MgSO4 will address it, you will not need much and at a Gh of 10, I'd bet you have NO3 issues much more than Mg.

Regards,
Tom Barr



plantbrain is offline  
post #9 of 9 (permalink) Old 07-19-2005, 08:22 AM Thread Starter
Guest
 
PTrader: (0/0%)
Join Date: Feb 2005
Posts: 133
The reason I do not perfom water changes often is that I live in a very hard water area and R/O water costs a alot.Perhaps I'll change the habit soon.I agree with Plantbrain that Mg deficiency is rare but in a tank with very little water changes and also being a nutrient sink of both NO3 and PO4 but with out dosing Mg this sounds reasonable doesn't it?
Phil 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