Not sure if this is the right answer do you mean that you are growing hydrophonics and the roots are seeping over root platform and going down into your resiviour.If this is the case dont worry about a thing because every littlr thing gonna be alright[the great bob marley]mine do this all the time the main thing to watch out for is check your rooy coulour mine are always white with no miss coulouring make sue no light gets to your roots.i'm not sure if this is the right answer could'nt understand question but now you have a little more info whitch helps.