Hydrogen Peroxide - I need to "disinfect" the water in the in-hull water tank on our sailboat. We do not drink the water but do use it to wash our dishes and clean galley surfaces. Instead of using chlorine bleach (currently using ~1/3 C/30 gallon tank), I wondered if I could use H2O2 instead. I have read that it breaks down readily in water, so perhaps it is not a stable long-term choice. But if it is a plausible choice, what strength H2O2 should I use, and how much should I use per 30 gallons? Thank you in advance for your advice!