Sorry if I wasn't clear. Indoor temps have consistently been around 78 F. Nutrient/water temps have been around 60 F, until I got an aquarium heater yesterday and bumped it up to about 70F.

I've got some more (pathetic) pics...note the abundance of roots already floating around the reservoir itself...

...after two great grows, this one's turning out to be the sad one. I'm going to keep them vegging until the leaves turn green or until they die (sob sob). My friendly hydro guy's latest theory is that now they're not getting enough nutrients...the EC meter reads .7...he suggests bumping it up to 1.1, given that they've been vegging for three weeks now...he also suggests taking the lights from 24/24 to 18/24.

all best and thanks
jash