Can't quite figure out what to do for Phalaenopsis

[alsorchids]

Hello out there in Orchid Land! I have a Phal. that in about 4 years has bloomed for me many times and last time last spring/summer with two long spikes. It seemed healthy with consistent and increasing leaf growth About two months ago it lost its bare spikes and two of six leaves I checked the roots and found only the surface roots were healthy! Yes the media seemed wet though I only watered once a week. I repotted in medium bark and used Fungicide/Bacteriacide soak on bare roots and media. I let this orchid dry out for 8 or 9 days and then have soaked pot and all in Dyna Grow root tone every two weeks. There are four rather flaccid leaves and one new one which has stopped growing sometime ago. I see one new healthy root under the media surface and the plant seems to dry between weekly watering. I check the medium before each watering. Today two of the leaves are yellowing(old). What can I do for this Phal? P.S. I fertilize weakly weekly alternating fish emulsion with seaweed 3-2-1 with MSU fertilizer at half strength. Might the fertilizer have a adverse effect?