Fertilizer Question

[LuvPhals]

I bought some orchid fertilizer by Dyna Gro with the numbers of 7-8-6 that says mix 1/2 tsp per gallon of water every time you water. This fertilizing is for my rescue Noid's. Does this formula need to be weakened up some from the directions or is it okay to use as directed? A couple of my Phals are really struggling and this would be their first fertilizing. Another question with these is should I just run it through their bark pots to drain or soak them a while? I repotted into the fir bark and there is some rooting on each but I don't want to hurt them more! I've tried to dry them out a bit and mist and use humidty trays so I think maybe now they need a good healthy drink!