Salt build up In ebb&flow system??(pics)

Here's the top of my table, i have 6 clones and one seedling currently going, Now i noticed salt build up on some of the hydroton, and some around the wholes in the bottom of the pots like the white stuff was around the wholes, I took this picture after i already sprayed most the salt off with a water/3% H202, or I at least tried to!!

Now here is my res



I'm using Lucas formula with GH nutes, from what I read and from experience running it in DWC, They can be very salty, as you see in the pic the empty part of the res has a salty white build up and a few inches down in the water i feel the salty texture on the walls.

I just need some advice as the best way to clean it, and also help prevent it from happening any advice would help, thanks in advance dudes!!

if not can any give me any links to anything having to do with salt build up, I've been searching but can't find any with an ebb and flow setup

would anyone recommend using Drip clean with lucas formula for preventing salt build up?