Ginger, I picked up a copy of your book “Indoor Salad”. It’s a very good book, well written and full of useful information. Based on its recommendations, I’ve lowered the target EC for my lettuce gardens to 1.7, I’d previously been aiming at 2.0. I also changed the target pH from 6.0 to 6.5 for the lettuce. The book is available in paperback for $15 on Amazon, and less if you have a Kindle. Well worth it!