I've had problems with fungus gnats and damping off also.
Although my seeds are kept in a small fridge year round, I did not do the water/peroxide seed soak in the fridge for 3 weeks like I normally do. I just let them soak at room temperature and I did not have as high of a germination rate. I will go back to soaking in the fridge next year.
I did lose several seedlings to the fungus gnats and dampling off, but things have improved since I put perlite on top of the seed starting mix. I will never again buy growing medium with coconut fibers for starting my seeds, it holds too much moisture.
Our temps will be dipping into the 30's the next couple of days, I won't be planting outdoors until late May, but will acclimate them on and off as temps allow.
