Ugh, that's the only downside to ADA aquasoil in that it takes a few weeks for all the ammonia to leech out. Although I suppose you could probably cycle your tank using it if you didn't have any plants that would be affected by high ammonia levels.
However, my hairgrass loved it, and was sending off new runners even when I wasn't fertilising properly or giving it enough light. The only reason I took it out of my tanks was because they weren't heavily planted enough not to gravel vac and Aquasoil kept making the water cloudy.
Your tank looks very nice
. I'm always tempted to go for that sort of look in one of my tanks. Maybe you could tuck in a few anubias nana 'petite' around the smaller head and log.