What should the results of a 3 day blackout look like?

After battling BBA and BGA at various times, with varied successs, I decided to do a 3 day blackout. This is the 125 gallon that I had asked various questions about before. This is one of the threads describing my situation.

http://www.barrreport.com/co2-aquatic-plant-fertilization/3047-why-bba-growing-my-diffuser.html

I wrapped the sides of the tank (except the back) in Glad garbage bags. The back has a vinyl blue background already, so I didn't touch that. For the top, I just throw a large heavy blanket on. I turned off all the lights and the CO2 and left for a 3 day weekend.

When I got back and slowly peeled back the coverings, the fish all went nuts of course. Plants were all ok. A little bit of BGA (the main reason for the blackout) was all gone. However, it didn't look like much, if any, of the BBA had died. Is that normal? Will they die over the next while? I've got my CO2 cranked back up now, with the normal lighting schedule of 8 hours.

I am concerned that I didn't do the blackout long enough. Oh yeah, one thing I omitted. I did a large (50%) water change immediately before and after the blackout, along with a gravel vac.

 

Ah...thanks Tom. I was mistakenly thinking that all algae would be affected.

I've been spot treating with Excel full strength (about 15 mL at a time). I guess it's time to get serious. I'll up the water changes (I am currently doing 50% twice a week - I'll go to 3 times a week. Guess I'll have to go to EI type dosing then, since the fish won't be able to keep up. I had been only adding Epsom salts, K2SO4 and trace twice a week.

I'll turn up the CO2 a bit more, although the drop checker is showing I have good levels. Water movement is pretty good, as I have an FX5 and an Eheim 2028 in there, so I don't think I can improve it any and have my fish not be stressed.

 

Thanks Tom. I'll try the Excel/water spray idea.

I have already incorporated many of your ideas from previous threads.

1) I am misting CO2 from two diffusers. One on each side of the tank. That's working well.
2) I added 6 SAE's. Only 2 survived the original onslaught of the now 10 inch Chocolate Cichlids. They are now healthy and fat on algae and leftover foods. I guess I might have to get a couple more. There are also 2 bristlenose plecos and 1 giant Gibbiceps pleco, plus 4 corys in the tank, but of course they only do cleanup and remove green algae, not BBA.
3) This is a low light tank already. 144 watts (60W T8/84W t5) on the 125 gallons. Full 144 watts on for 8 hours and 60 watts on for 1 hour before and 1 hour after.

I'll go the aggressive route and try all your suggestions together (3x 50% water change, the Excel spray, reducing photo period a bit more).