Step 3Filling the Base
Line it with a black plastic bag, This is cause styrene used to make polystyrene can be absorbed by plants, making them unsafe for consumption and eventaully the plants will be sick.
Mix the hydroponic mix as per instructions (there are 2 many)
Mine suggests
(1/4 strength for the 1st week)
(1/2 on week 2)
(Full Strength after that)
Fill it 1.5 - 2 inches from the top depending on the depth of the pots used and the amount you have protruding through the lid.
Basically, until the roots can out grow out of your pot then you simply add less water and let the protruding roots suck up the water, not the medium in the pot, but to start with the medium needs to suck up the water so make sure that the pots are sitting in the water by a centimeter.
P.s. Once a week top up the fluid, water is fine, just remember how many litres and you can add hydroponic formula later
If plants drown or get sunlight on their roots they will droop, if they have too little nutrient they yellow starting with leave's veins.
Basically slighty more water is easier to manage, add to much nutrient and you'll kill the plants very quickly.
Hope that helps.
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