Good idea on keeping the wrap on the cubes, I would suggest getting grow plugs instead next time. Were you giving them nutrients? They were far to young to get nutes. Just let them chill in a tray with ph correct water till they have 3 or 4 sets of leaves then throw them in your system.

Don't start your new ones till you have your ph meter, the correct ph is imperitive in a seedling, I learned this the hard way.:thumbsup: