Plants are thriving – I think you caught the “chemical mishap” in time.. Checked plants at end of day yesterday and the first plant hand some branches (with flowers) badly drooping. I took off the lid and the perlite was bone dry 5 / 6 in. down. Pulled up hoses, ran
pump, and discovered roots had completely blocked the tubes. Replaced hoses, watered manually, and the next day the limp branches had sprang back!
Concern now – a “freak” cold snap – Wednesday could drop to upper 30’s overnight. Moving them into garage is no longer an option. I have a small heater working it’s butt off, and so far I’m able to maintain low 60’s. I’ll probably plug in the water heater, warm water may help. Pump is still running 30 min off 5min on, 24/7. My temporary greenhouse is being put to the test. I may add old blankets around the bottom tomorrow, possibly some on top. I’ve been here over 12 years, never seen a cold snap this late. Fingers crossed - will keep you posted.