I flush once every ten days in my NFT system, but I'm trying to do the opposite Mother in soil grow in Hydro. The mothers I ept of the skunk I fed very little utes maybe once a fortnight a very low dose & the rest plain water as I was trying to stop them growing much.

Although that could be totally wrong & doesn't help you in the DWC most DWC plants I have seen get very big & I personally would keep that for a crop plant.