alcohol and water 1-3 1 part alcohol 3 parts water.great sanitizer,no harm 2 plants-GUARANTEED.I spray my plants daily(best spider mite defense on the market,2 bad its not commonly known
I also use this mixture in a 5 gallon bucket and submege my plants under water for around 15-30 seconds,every other day with no reprocussions.
The alcohol simply evaporates.I do not recomend folar feeding in direct light.