Well Id definatly recoommend you get rid of that peters food. Its worthless for orchids as far as im concerned.
Heres a link to some very goood fertilizer designed specifically for use with RO, Rain or Distilled water, with orchids.
There is no need to flush with this fertilizer.
(I worked for this company for several years,
they still produce some of the finest orchids in the country.)
1/4 strength would be a 1/4 teaspoon if the manufacturer was recommending 1 teaspoon per gallon.
The new locale sounds perfect.