You could use the standard dose of 1ml (per 10 litres), but as per @Zeus.’s table above, EI levels are reached at about 5ml per 10 litres, so I personally would double up and maybe do 2ml per 10 litres to start with and see how you go.
Your tap water will be giving you some elements too, so if you are planning on a decent weekly water change, that will help too.
Be aware that lots of people dose a lot less on low tech tanks though, so don’t take the above as gospel - I just personally prefer a system that removes as many variables for me as possible, so dosing EI (though a reduced version) on my low tech, in combination with lots of water changes, works for me, and takes some of the thinking out of it.
Your tap water will be giving you some elements too, so if you are planning on a decent weekly water change, that will help too.
Be aware that lots of people dose a lot less on low tech tanks though, so don’t take the above as gospel - I just personally prefer a system that removes as many variables for me as possible, so dosing EI (though a reduced version) on my low tech, in combination with lots of water changes, works for me, and takes some of the thinking out of it.
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