You could probably use a wetting agent like drip clean or sm90 but I think you would be doing harm to your microbe colonies negating the use of general organics, in that situation it would probably be better to use a non organic nutrient line. Dutch masters gold line is the beezneez as far as non organic lines go. Organic and hydro arent that great of a combo in systems that require the use of tubing and hoses due to the cruddy concrete like shit that builds up in the lines causing clogs and all that. Theres nothing worse than having to stick your hands in a nasty res for some reason or another. I actually threw a complete res complete with pump and everything in the garbage in order to not have to deal with it, thats how nasty it was. The best way to run organic hydro would be a recirc system with 2"+ pipe size used to plumb it up, a UC system is the perfect example. Or the other thing would be an aquaponic type system where you feed the fish, in order to feed your microbes, so your microbes feed your plants.....But to my knowledge, those are the best 2 ways to run organic hydro, doing so in other systems can be done but it can also be a lot of work on you, especially if you arent running a chiller, forget it.
And just for your info, that nasty res that I threw out was the makings of my attempt at organic hydroponics in a bubbleponics system, seriously.....find another hydro system or do soil less, you'll be much happier unless you are one of those rare hydro guru's who already knows whats what, but if that was the case you wouldnt have asked. Good luck.