I went out at 6 pm to check on my seedlings - ~105 degrees inside. I have a watering bin - 12' long by ~31" wide (it holds 21 1020 flats) and saw that lots of seedling trays needed water. Added 15 gallons to the res and then pumped it into the bin. About 1500 seedlings are now soaking up water and getting replenished!
This summer/fall, I want to build shelves, enough that I can handle 50+ 1020 trays, two of which I'll be able to flood with water. I'm sold on the Oasis Horticubes, the ones where 162 will fit in a 1020 tray. I wish I could find the 36-pack, deep cell nursery flats but ones that I can break into single cells. Fortunately, I have about 10 months to search!