ScrOG: LSP x Iced Out

Hello guys, my native language is portuguese brazil, but I'll make some comments in english too, so sorry bout my "english". Let's go, so this week was just fine, topped and let just the 4th and 5th node, cleaning below the stem. Some nutrient burn, maybe that's because of the excess of diatomaceous earth... But at least I can't see gnats anymore so, worked I've made two waterings with Root-Juice from biobizz, but now I'll keep just tap water (sit for at least 48h) pH'd 6.5 Run off was at almost 1000ppm, pH 6.5 at 24ºC. That's it, thx.