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Coralline algae growth question

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MzWeazelle

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Joined
Jan 11, 2004
Messages
169
Location
WA State
We let coralline algae grow on two walls on our tank and have noticed that there is a definite line above which the coralline doesn't want to grow. It is so obvious it almost looks like we clean down about 5" and stop. On another thread I noticed someone wrote that coralline doesn't like strong MH lighting. We do have 2 250 MH lights on a 140 tank. Would they tend to retard growth to that depth?
 

big t

tankless
Joined
Oct 21, 2003
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Denver
It could definately be part of the problem. I have noticed that since changing to MH that most of my corraline on my glass that was previously completely covered is now receded back to almost nothing.
 

cdeakle

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Feb 25, 2004
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199
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Lynnwood, WA
I'm curious as well. I don't believe in too much light, I haveactually gotten more purple coralline growth since upgrading to MH's. I have the same problem, weird how it looks huh?
 

MzWeazelle

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Joined
Jan 11, 2004
Messages
169
Location
WA State
We've just noticed the effect in the last few weeks. I think that's because I've been better about keeping my calcium level up and I'm getting more coralline growth as a result.

If anyone has any research or links that talk about this I'd love to read more. :)
 

reefer

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Jan 25, 2004
Messages
136
Location
Olympia, WA
My purple coralline algae has started to turn to a light green or white color, Anyone know whats happening to it?
 

jon warner

in the Biz...
Joined
Mar 17, 2004
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29
Location
Los Angeles
MzWeazelle said:
We let coralline algae grow on two walls on our tank and have noticed that there is a definite line above which the coralline doesn't want to grow. It is so obvious it almost looks like we clean down about 5" and stop. On another thread I noticed someone wrote that coralline doesn't like strong MH lighting. We do have 2 250 MH lights on a 140 tank. Would they tend to retard growth to that depth?
Do you ever drain the tank 4 or 5 inches to change water? If the coralline algae gets dry even for a few minutes it WILL die. Most species of coralline algae flourish under light, but not all. Look at those beautiful pastel colored coralline algaes that show up on Tonga Branch and/or Marshall Island rock, that's deeper water low light coralline algae and most of it will disappear in our home tanks only to reappear on the UNDERSIDE of our live rock ;)

Jon
 

MzWeazelle

Well-known member
Joined
Jan 11, 2004
Messages
169
Location
WA State
Jon - now there's a thought! Normally we do NOT lower the tank water when we do a change. I know it means the change is less effective, but it also means there is a lot less disruption for the fish.

However this last time we DID lower the water level because we wanted to do a little rearranging. I think we lowered the water a little lower than the current line, but you may have hit on what happened. I think we started noticing the line shortly after that water change.

Thanks. :)
 

tomz

Reality; an open mind
Joined
Jan 14, 2004
Messages
76
Location
Snohomish WA
Actually, as we learned in the "Anthony Calfo " meeting, leaving the lights on when the water level is low is what bleaches the coralline algae as opposed to it drying out. I verified this the last time I had a low water level for a couple of hours. The coralline was fine when I filled back up unlike the previous time when I left the lights on.


Tom
 

MzWeazelle

Well-known member
Joined
Jan 11, 2004
Messages
169
Location
WA State
The lights weren't on when we dropped the water - I was at the Calfo meeting, too, and remembered. :)

I don't know if the coralline was ever growing up all the way. Actually, it's almost more like the algae grew up so far and then stopped. Dropping the water level may have been part of the problem, but maybe not all.

I'll have to keep an eye on the tank and see what develops.
 
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