[clstgrwr]

My seedling growth seems to have stopped all together. The wild west sedlings are now all abot 2-3 inches tall with only one set of true leaves but the second set seems to be nowhere in sight. the couchlock, which was slow to germ in the first place has only produced one seedling (from three seeds) and the one seedling that there is seems to be growing very oddly. I've germed seeds a few times before and have never seen a seedling grow like this. there are no roots at all ( I know because i bumped the tray and it fell over). would adding a heating mat for help promote root growth? if not what else can I do?
the first pic is the weird couchlock seedling, any thoughts?
the other one is the three wild west seedlings who look healhy but dont seem to have grown in the last 3 or 4 days.
last pic is of my house mate's hermit crab Vince.