So near my site which is a massive hill, I have a pond it's got that stinky black nasty stuff all the way round it if you scoop a bucket in. Is this stuff any good to mix in with my clay soil. It must be full of nutrients. It smells rotten as fuck like stagnant water. I've already mixed all my old indoor soil with pearllite into the clay, and there are shit loads of worms in it, and it is on a hill so I'm hoping it will be ok. Maybe I'll try one hole with the black shit added. See how it does.