What gas should I buy to carbonate my ipa I’ve just brewed. Pure CO2 , 70/30 or 60/40?

I’ve just finished making my home brew set up out of some old barrels I was given and want to give everything a good clean before my first run, what would yous recommend ?

evening everyone im looking at brewing banana's mango lassi ipa but i only want 20L of it as i only have one korny keg , im unsure what needs altering and how much water i need , thanks for any help https://www.brewersfriend.com/homebrew/recipe/view/706541/mango-lassi-ipa

Afternoon everyone, I'm looking at building an electric heated kettle from a 30 L keg and was wondering if anyone could recommend some heating elements, I was thinking of using washing machine ones but read that they might not do the job.i will just be plugging them into a socket 32amp I think...

im looking at building a mash tun but not sure what size cooler box to use. My boiler is a 25L fermeter tub. Also when mashing in how much water do you add is it 1.5L per kg or malt?

Would someone be able to write me a recipie to make around 20 L of roosters Yorkshire pale ale http://roosters.co.uk/wp-content/uploads/2017/10/YPA-Product-Card.pdf It mentions Hops bobeck and dana Malts golden promise

good evening everyone was wondering if anyone has a recipie for a roosters Yorkshire pale ale ? . It’s a favourite of mine but Is never on tap round my way anymore so I’m taking up all grain brewing to hopefully make something similar :)