I love Rapid rooters! Normally I germ under a dome in rooter trays, first sign of root then goes into 5x5 plastic square pots that have my coco mix-prerinsed, and only slightly damp pre prepared. The reason I don't go into 5 gal pots directly : I over germinate and early veg so that I can pick my strongest plants and save a bit on electric under 2T5s. Veg space will accommodate 8 5 gal pots under 4 T5s.Then transplant . I admit - my brag- I've never lost a plant in transplanting. Hope I didn't queer the deal in saying that too.
i love the veg period!
PS all water- rinse or feed is PHed to 6 or 6.1