Hello, I am trying to save some fogged Ilford Galerie Grd3. Hard to describe the extent of fogging but I would say it's more than slight but not severe. I have tried adding a 1% solution of BTA to my Dektol (1:2) in varying amounts but have seen no effect so far up to 70ml BTA 1% per litre of working strength solution. Developing strips of the fogged paper alongside some fresh Grd2 Galerie and increasing the BTA up to the amount mentioned above I can see no difference between 20ml/litre, 50ml/litre and 70ml/litre. How far can I go with BTA? Is this experience normal? Thanks very much, Matt.