I tried the heated bottle approach, I used orange juice huge plastic containers along with mouthwash and more, it was not enough to keep my 60 warm or even to heat it up.
I believe my Son's 6 gallon tank did fine with that approach, but for larger tanks, no. I still had hot water so I did water changes to bring the temperature back up.
I got power up last night, and today, I still see a bunch of berried RCS swimming around, so I guess the fish and shrimp are more hardy than we make them out to be.
Every speck of algae is gone though from my tank, after 3 days. So its a good thing?
Nikon Pimp #82