Sprouting grains - show me your set up, and how long to sprout for?

Hi folks We have 100 layers here, hoping to go up to 300 next season. Feeding a mix of straights (oats, wheat and peas) plus supplementals (oyster shell & seaweed meal on free feed). We keep them using pastured system - an egg mobile moved everyday. Hoping to start sprouting at least 50% of their daily ration.
We are feeding 10kg (22lbs) of feed ration at the moment daily, and will be moving up to 30kg (66lbs) daily by the time we have 300 hens. anyone else sprouting at this level (or near it) show me your set ups!

Also wondering what the optimal sprouting time is, or how to judge it?

Thanks!

You are on a much larger scale than I have experience with but I started using the bucket method from jack Spirko at the survival podcast. It's 5 buckets with some holes that results in sprouts rather than grasses (I've read this is better as they have not reached the photosynthesis stage and maintain a higher nutrient content)

Simple quick and a small foot print.

Later I moved to using 8 concrete trays one on the bottom set 2 ft off the ground with no holes in the bottom but a drain spigot in the center the other seven stacked on top with 1x1 wood sitting across to elevate them to  allow growing space have drainage holes drilled along the bottom. I use apple cider vinegar in my initial soak just a cap full per 5 gallons. It's supposed to keep mold at bay but I never had an issue with mold before I used it. Once they are stacked I fill the bottom drainage tray that is nested in the spigot tray with water to soak the seed for 24 hours then drain that and fill the bottom tray with new seed and pour the water I drained over the top tray so on and so forth until I run out of trays. They are usually ready in 5-7 days and the rotation continues.

If I were to improve on that system I would make a sturdy frame that the trays slid in and out of and add a pump to sump bucket below the soaking tray with a timer to flood the seed trays at the top couple of hours and allow it to trickle down to the reservoir again.

That being said a stack of five gallon buckets with holes in them doused once or twice a day with rainwater works pretty well!

Good luck

Any chance of a photo? sounds interesting.

I do not have a photo but I'll attach a photo of what inspired the idea.

The only thing different with mine is that I used concrete mixing trays and added a drain valve to the tray below the bottom rotational tray.