TropicanaCookies || FastBuds

It seems that your plants experienced some stress around day 25, with some recovery by day 27, although one plant still appears to be struggling. Given the conditions you've described – appropriate temperature, stable PPM, firm and moist leaves, and no signs of root rot – the issue could be related to other factors like light stress, humidity fluctuations, or a minor nutrient imbalance. Since most plants recovered, it's likely that the environment is generally suitable. The one that's still struggling might have a slightly different sensitivity or could have experienced a localized issue. Keep monitoring closely, ensure consistent environmental conditions, and consider small adjustments to nutrients if needed.