TimV
New member
<a href=showthread.php?s=&postid=6916277#post6916277 target=_blank>Originally posted</a> by SoonerFan732
I do have two spare bulbs to replace to oldest bulbs (6500K/10000K) perhaps I will switch them out and see how that goes.
I have also added some attachments to my maxi-jets that rotate (driven by the flow output of the powerhead) to alternate the flow a few weeks ago. Maybe those things reduced the flow in the tank quite a bit more than I thought (Doesn't cyano like lower flow?)
So why does the algae appear to recede in the evening? After about 7 PM it is hardly noticable (however the green algae under the red shows up more, but the red is hardly noticable). Those pictures don't really show the difference as well as seeing it in person. If it looked like it did later in the evening it really wouldn't bother me, but in the afternoon it looks like a forest waving around.
Thansk!
Kevin
During the day it is undergoing photosynthesis with a byproduct being oxygen. THe oxygen bubbles accumulate and makes the mass expand. When the lights go out, the oxygen dissipates and the mass appears to get smaller.
Lights may be part of it but in my experience I've never been able to definitively figure out why I occasionally get it. For me, it has nothing to do with lighting as it will occur with new bulbs as much as with old bulbs. It will only populate a few different rocks and only those rocks and it has nothing to do with flow. So I'll treat it and it will go away for 6-9 months.
Erythromycin won't have any detrimental effects on your tank if used properly.
T