Shitty deal bro...I see you found my advice on another thread. It is geared towards preventative action, cause once it is identified it is already too late! Seedlings with damping-off will die and cannot be saved. Proper prevention is the only way to avoid problems with this disease...it spreads like a virus and is a bitch.
When planting seeds, make sure that work areas, tools and pots are pathogen-free. Spray disinfectants that are at least 70% alcohol can be used to disinfect tools and workbenches. To disinfect previously used pots, wash them with soapy water, then soak them for at least 20 minutes in 10% bleach, then rinse them thoroughly to remove bleach residues. DO NOT reuse plastic pots if you have had problems with damping-off (or root rots) in the past, as they are difficult to disinfect. Be sure to use a well-drained, pasteurized potting mixture when planting. DO NOT plant seeds too deeply and germinate seeds at high temperatures, so that seedlings rapidly grow out of their susceptible phase. DO NOT overwater as damping-off fungi such as Pythium reproduce and infect more effectively in wet soils. Finally, if the techniques above do not work, then use of fungicide-treated seed, particularly those treated with captan, can dramatically reduce problems with damping-off.
Again very sorry to hear bro, best of luck in your future grows.
