Hi Cyclone this is a UK based site but all are welcome. You certainly have the Canadian version of red spider mite and they usually lead to other problems. Try to make sure that when you apply fertilizers you don't get any on the leaves as that can lead to burning. You also need to give your plants more air and light as you have some grey mold on some of your plants. May be a spray with a copper based fungiside would deal with the mould. Red spider are difficult to eradicate without resorting to pesticides, although Im fairly certain that a biological cure is possible.
Hope you save your plants and good luck.

Ian