I would like to experiment with hydroponics - probably the Kratky method as this seems the most beginner friendly, and doesn't require too much kit. I live in the UK and would like to try indoor hydroponics, on a south-facing windowsill, with a view to growing things like herbs and salad greens (at least to start off with!)

I also want to be as environmentally friendly as possible, so I was thinking about the following:

Organic solution if poss ('bio-grow?')

Medium such as coconut coir, or hydroton as this can be re-used, right?

Big, lidded bucket

Mesh plant pots

Any tips or advice?