Get a 5 gallon or 20 l bucket whichever you have available and put a net pot to covers the whole top on it The actual net itself can be much smaller diameter.
Make sure you have a good pH pen and EC meter. your air pump should be rated at 20 l per minute which usually means the 20 l is the top end.
Some kind of root inoculant like food grade H2O2, usually about 30 to 40% H2O2. Put two mills in for every four liters of water.
You will need pH down at least, a lot of people use silica for pH up in hydro. Silica is basically liquid sand and it helps strengthen the plants as they're growing and you don't have any sand in hydro. I think they may call it silicon in the UK.
What you want to do is run your airline down through your net pot right where the pebbles are and be able to lift that whole net pot up off your 5 gallon bucket and set it right down on a new one for a res change or something like that. It works real well that way.
then you'll really need to understand the following chart.
https://www.thctalk.com/cannabis-for...d-how-to-react
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