[Support request] Seed starting and the tray2grow system

So with the regular autopot design, it’s suggested to not turn the aquavalve on until roots are establish and the plant is big enough. Is that a concern with the tray2grow system? I just purchased two trays. One will be used with the build a soil custom grassroots bed similar to the autopot fabric bed, and one I was intending to use with seeds started in 1L fabric pots (or maybe solo cups). I was concerned with turning the tray2grow on right away and having the medium heavily saturated while a seedling is developing but I see you sell microgreen and seed starting trays so I’m unclear on the differences here. Both the tradition autopot and the tray seem like the soil would wick up the water the same, just not sitting in .75inch of water.