I was having problems with mold when I was trying to grow fodder with an 8 day process. With sprouting, I haven't had that problem but the process is now only 3-4 days. I don't have a large number of birds here in town so the small containers work for now. They aren't very pretty sitting on my counter next to the sink but that's okay with me. It does take 15 min twice a day to rinse them. I don't mind the morning because it is part of my routine but I don't like it when I forget at night and have to get back up to rinse grains.I used to sprout grains for my flock. I had five large buckets. Four of the buckets had holes all up the sides for drainage. Day 1, I would soak the grains in the first bucket. Day 2, I would dump the grains into the second bucket to drain and rinse them with the hose once or twice. First bucket would be filled with fresh grains to soak. Day 3, dump the initial grain into third bucket and rinse. Bucket #1 is dumped into bucket #2 and rinsed. Fresh grains are set to soak in bucket #1. Keep repeating this process, moving the grain each day to the next bucket. On day 5, feed the now sprouted grains from that bucket.
I quit doing this because it was labor intensive, grains were slow to sprout in cold weather and tended to mold or go bad in hot weather if not rinsed many times a day. My birds didn't seem to benefit from it. They sure enjoyed the sprouts, though.