I switched from using advanced nutes 3 part formula to "the other tomato" organic 3 part halfway through my grow and so far so good I just started with the chemicals when i didnt know what I was doing and now switched to organics. click my avatar to find my grows I have some pics up
ive done the opposite, started with organic ferts in soil and transplanted to hydro(dwc) and switched to chem ferts, gh flora duo + liquid kool bloom. since the plant was already pretty decent sized it went through shock for 3 weeks since it needed to build a new root system to drop down into the bucket. i dont think the ferts had anything to do with the shock. i doubt the plants would notice unless you over feed. u could possibly flush before feeding different nutrients if you wanted to be on the safe side.