Matt F.;84588 said:Hi, Tom--
Thanks for breaking it down.
Sure, one of these days you can take a look at it --when we're both not too busy.
The 3 day brown-out (lights off with glut daily) put a major hurt on it. Prior to the brownout, I cleaned the tank (scraped the glass, wipes down the seams, did several 50% water changes etc.). It took some time for the algae to rear its head again, but sure enough, it did as soon as the photoperiod was increased to beyond 6 hours.
I also noticed the other day that I was lean on my monopotassium phosphate dosing...wonder if this contributed to the algae proliferation. Plants look nice and healthy regardless.
What works so far:
a 3 day brown out works after a cleaning to prevent the GDA from re-attaching to the aquarium walls, but it seems to come back. This GDA doesn't seem to attach plants, just the aquarium walls and rocks. Another thing I notice is that when the substrate becomes clogged with detritus, the GDA doesn't seem that far off. Had this problem in my Mini-M, too, before I tore it down. This time, it's not as bad. The tank looks totally clean now. We'll just have to wait and see if it comes back again.
I have increased the phosphates in my tank.
I have rescaped the right side of my tank and done several large water changes, So far, so good.
Will keep you guys posted.
ajfjavi;85100 said:I wasn't aware that indoor aquariums are affected by the change of seasons. Is it the water source changes between seasons?
dutchy;85214 said:I have a low light (30 umol) non CO2 tank that has virtually no GDA.
Toro (1989) found that phytoplankton growth is not a function of photoperiod but of total amount of light per day.
In my constant quest of beating GDA I've also found out that less flow against the front window is better. This seems to be strange, because the flow that was hitting the front window before were the CO2 outflows, so water with high CO2.
Concerning CO2 and O2:
"Two different culture media, namely CHU12 and inorganic fertilizer NPK (20-5-20) associated with
macrophyte (Eichhornia crassipes) extract, were used to evaluate the development of A. gracilis.
Growth rate, development, nutritional value and medium water quality were analyzed. When hydrological
variables in the culture medium of A. gracilis are taken into account, dissolved oxygen and free CO2
alone failed to have any significant difference (p>0.05) between the media employed."