Yeah the SC is the super concentrate. You can buy it already diluted but it's more cost effective to buy the concentrate (I agree, be careful with it in concentrated form) Then mix it in a spray bottle at 1:125 with water. If outdoors isn't an option at this time of year, he may enjoy some time in a window to get some UVA/heat. Even sunlight through a window provides a really bright natural light that can't easily be replicated by artificial lighting and may be beneficial. I would consider the F10 treatment experimental but if his infection is still spreading it may be worth trying.