Watering from Bottom
I've just started seeds for eggplant, cherry tomatoes, beefsteak tomatoes, cantaloupe, watermelon, strawberries,onions,lettuce, stevia, and a bunch of other plants. I am in a zone 6B. I have four 72 cell seed starting trays and I was wondering when I water from the bottom, how much do I fill up to on the tray (.5", 1", 2", 3", etc) and for how long?
Also, I would like to mix in some 3% hydrogen peroxide (when I water from the bottom) to really ensure no mildew or damping off forms. What is the best ratio of hydrogen peroxide to water? I've heard people recommend a ratio as high as 1 cup h2o2 for every 1 gallon h20. This apparently isn't dangerous for the seeds because 8 ounces of 3% diluted hydrogen peroxide in 1 gallon is only .24 oz of hydrogen peroxide in 136oz of water-- only .17%. I don't even know if this is enough to be effective. I've heard plants can tolerate as much as 5% hydrogen peroxide concentrations, implying that the h2o2 could be applied directly from the 3% solution bottle--has anyone tried this; would this concentration be safe for the seeds/seedlings; and any warnings or experiences that would be helpful?
Lastly, I have the starter lids on and a lot of condensation has formed on the lids. I've only watered them the day I sowed them, which was 3 days ago. As long as there is moisture on the lid I shouldn't water, right? I'm begining to worry about mildew forming from all this condensation so I'm thinking about taking the lids off and letting the trays aerate. If I do this how should I check to make sure when it is time to water and approximately how long between waterings (I know it varies but I'm looking for an approximation--I've heard two days sound about right).
Thanks for all the help.