I noticed on Saturday night, Nov 11, that I had accidentally plugged the 96 watt PC light into an untimed outlet so that it was on 24 hours a day for at least a week following the blackout of 6 days. Maybe that is why the green algae is starting to make a comeback in this tank. It is now on a timer for a 12 hour cycle. So I have about 150 PC watts on this 65 gallon tank.
This tank spent 6 days without power during Hurricane Sandy. The water temperature went down to around 55 F or so. I cleaned all of my Eheim filters on all of my tanks while the power was off so I would not get a huge anoxic spike in the tank when the filter started back up. I am glad I did.
I have two PC lamps on this tank, 96 & 55 watts. Both lamps were just changed as they would not start back up after the power failure, or failed soon after.
I removed rocks on the right side while looking for dead fish and weighed them. The ones removed totaled 65 lbs. So I am estimating I may have had 250 lbs of rock at one point.
The video in the post above shows the tank right after removing the rocks. This video I"m posting today shows the tank a week later. The green algae is really growing in and has already covered the bare areas which were shaded by the old rocks.
It is amazing how much this tank is pearling without CO2. The lights come on at 6 AM. I get to work at 7 AM. The tank is not pearling at this point. By noon, pearling has begun. By 4:00 it is almost like the tank is carbonated. The only plants here are Vallisneria and Green Algae. I would like to ignore the Red algae on the rocks, but I am really fooling myself. It does look like it is getting overgrown by the green algae.
I added enough Potassium Mono Phosphate to raise the levels to around 2 ppm as phosphorus, not P2O5, not PO4. I really did not see any difference in the bubble production at the end of the day. I normally don't fertilize this tank at all.
Noon time video, Nov 15, 2012: http://youtu.be/rzW10mwH_ec
4:30 video, same day: http://youtu.be/xnD0OMPzrOA