Hmm. Looking at it, it does look a bit thick... It should be ok though.
If you have ammonia reading, you may not be getting enough light. Soil tanks can take a little while to establish... One of the key things though, if that as long as you don't have fish, don't do anything.
Let the plants grow. If the water turns green, ignore it. (Hope you have some fast growers. If not add some. I see hygro difformis in there.) Eventually the tank will stabilise, and ammonia will disappear.
Don't prune the plants for a while either.
It looks like you have a lot of stem plants... Is that Vallisneria?
I'd move them closer to the back... The crypt is good where it is.
I would ignore it as much as possible. The filter you have running- is it splashing at all? You need to conserve your precious CO2.
My plants are coming in soon.