Seedleranswered grow question 10 months ago AFAIK there is no proven benefit from using ice in the final days. ph 10.2 is alarming high, your earth media can puffer some. Best plan would be: use ph down or buy bottled destilled water. "flushing" is not necessary at all. you just need to water them with low EC water so the plant uses everything it got stored. looks awesome btw!