Madagascar Lace (Aponogeton madagascarensis)

Three weeks in the unheated tank, 3 new leaves that all seem to be growing healthly, and I just transferred it back to my 29g and planted it with a Flourish Plant Tab underneath.
 
3 weeks later, and it now has 9 leaves with the longest being about four inches. The growth is slowly speeding up, just like the first time I re-grew it.
 
You accidently gave it exactly what it needs - a period of cool. This triggers it to grow.
 
You accidently gave it exactly what it needs - a period of cool. This triggers it to grow.

The first time I accidentally did. The second time was planned based on the results from the first accidental cold period, and worked perfectly.
 
AquariaCentral.com