Well silly me for feeding these little ladies as I’d forgotten I’d premixed some grow-mix from living soils, after spotting some issues I remembered this and flushed all 4, top dressed some worm castings and watered with light dose of calmag (very soft tap water here) after flushing then left to dry, 3 days later and new growth starting to look good again with vertical growth also improving. As soon as they’re healthy enough again I’ll transplant to 25l to get ready for flowering.