My questions are concerning hydroponics.
I have recently switched from commercial fertilizer to seaweed and composted chicken manure. While there are boatloads of folks using this stuff, I can't seem to find anyone who can give the basics on how concentrated chicken manure and seaweed are when made into a tea. For example, if one puts 6 or 8 gallons of water on 25 lbs of chicken manure, how much liquid off of that would you use on a 25 gallon deep water system, growing tomatoes? Is the seaweed you find on the beach, suitable to use along with epsom salt, or do the plants need to be alive? If you use 2 or 3 lbs of seaweed in 3 or 4 gallons of water, and you let it sit in the sun for a few days, how much of that would you use in a 20 to 30 gallon deep water system for cucumbers? Which would be better for each, and can the two be mixed?
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fromscratch
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Nature's Babe
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I was having similar thoughts on a smaller scale and was hoping you might have some answers 
I have a vague notion that you make normal compost first then soak it in water but keep it aerated then that gives the beneficial bacteria too? Also I grew up on an island they used seaweed
collected from spring tides - always stacked it first to let the rain wash out the salt then spread it on the land or composted it. Too much salt could be harmful, especially if added regularly or in quantity
I have a vague notion that you make normal compost first then soak it in water but keep it aerated then that gives the beneficial bacteria too? Also I grew up on an island they used seaweed collected from spring tides - always stacked it first to let the rain wash out the salt then spread it on the land or composted it. Too much salt could be harmful, especially if added regularly or in quantity