Gotcha- your cotyledons are coming off fairly normally so I don't think you're lacking in Ca. IIRC the dolomite wouldn't really begin to disperse/release into your mix until a lil bit later on anyway (anyone feel free to confirm/refute.) I'm not entirely certain from those pics but I spy a hint of burn on the very tips and a light N imbalance. I wouldn't worry about it. If you stick to the mix, it should even out sooner or later (they're just young and angsty )