OH, WOW! Now THAT'S scary!
@Sill is spot on about using coconut coir (my personal favorite) and peat moss for starting seeds and cuttings. It works great!
This is the first year I'm using the water from my aquaponics on my seed starts and it seems to making a significant difference. The water is still more alkaline than I'd like, but it's super nutrient-rich thanks to the fish poop and the worm castings. I've even begun using it to water all of my potted plants and they LOVE it.
I spent today cleaning up the majority of my garden, which has now died thanks to two nights of freezing temperatures. The chickens have been enjoying the amateur squash and cherry tomatoes, and the rest will just be green manure for my winter crops. I started seedlings of Russian Red Kale, Dinosaur Kale, broccoli and cauliflower down in my aquaponics room, so now I just need to prep the raised beds for transplants as they mature. I know the kale will LOVE the cooler temps, but I'll be waiting a bit longer to transplant the others.