http://boards.cannabis.com/grow-log/...ml#post1793519

Howdy Deja,

Check the last page of this guys log and his root porn photo. This is honestly what I would expect your roots to look like at the stage you are at. Obviously this did not happen with your roots and the key is finding out why.

55-65 is pretty cold.....the ideal water temp is 70 for hydro. Mine never get lower than 64.....is that a pretty steady temp for your water?

Buy yourself an aquarium water heater and stick it in your res.....set it for 70. Shoudn't cost very much. I'm going to study the effects of cold temps on roots and see if I can find any info on it.