Reef Central Online Community
The Filter Guys

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > Invert and Plant Forums > Marine Plants & Macroalgae
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old 07/03/2018, 10:12 PM   #1
mndfreeze
Invert Sexy Time!
 
mndfreeze's Avatar
 
Join Date: Jan 2010
Location: Tempe, AZ
Posts: 2,220
Does running carbon hurt plant growth in reef tanks?

Title basically says it all.

Trying to figure out why suddenly I can't keep macros alive in my little hang on back finnex breeder. Chaeto used to grow like a weed in there. The only things I've changed that I can think of is I added mud from florida pets to one side of it and some burrowing brittle stars. It seems to grow cyano a lot on it. Not sure if it can outcompete macros or what.

The other thing is I threw a bag of activated carbon behind my overflow spill over. This is an aquapod 24G cube, its old, the back chamber design is garbage. Flow goes like this through my tank system.

Distplay right side overflow into back chamber. Back chamber is one big chamber with a cut out at the bottom connecting the two, but has a divider up the middle. Right behind where the water flows into the back I have my skimmer, and aqua C remora. Bag of carbon sits there as well.

Left side "chamber" has my return pump at the very bottom, and a small pump and tubing that goes up into the finnex 1G HOB breeder box setup as fuge.

I've said this already before so before anyone says "it isn't big enough for nutrient export" etc, the goal is just a little fuge for pods and other weird microlife.

So does carbon strip away vital stuff for macro algae? Or is the cyano mats growing on the few inches square of reef mud out competing? Looking for any ideas.


mndfreeze is online now   Reply With Quote
Old 07/04/2018, 01:22 PM   #2
Michael Hoaster
Registered Member
 
Michael Hoaster's Avatar
 
Join Date: Feb 2004
Location: Boulder, CO
Posts: 3,281
Activated carbon does compete with plants for dissolved organic carbon (DOC), so I only run it when I'm trying to get rid of something. I doubt it is THE problem though. Cyano bacteria also competes with macros for nutrients. Macros need MORE nutrients than micros. The biological (bacterial) filter also competes with macros for nutrients. If your tank has recently matured, bacteria, combined with these other competitors may be limiting the nutrients your macros need. Assuming adequate lighting, it seems likely you don't have adequate nutrients to grow macros.


__________________
As many naturalists and environmentalists have suggested, we should set aside our arrogance,
our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey

Current Tank Info: 180g Seagrass Macro Algae Lagoon
Michael Hoaster is online now   Reply With Quote
Old 07/04/2018, 10:28 PM   #3
Subsea
Registered Member
 
Join Date: Dec 2006
Location: Austin, Tx
Posts: 1,828
DOC is produced as leakage from photosynthesis. Not all DOC is the same and not all activated carbon is the same. Coral DOC is full of lipids & protein and macro DOC is full of carbohydrates. IMO, it is always good to use modest amounts of activated carbon changed out every two weeks.


__________________
Laissez les bons temps rouler,
Patrick Castille

Current Tank Info: 10,000G. Greenhouse Macro Growout
Subsea is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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 On

Forum Jump


All times are GMT -6. The time now is 12:04 AM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.