Can you mix an match mods and tanks??

[rew]

So I've just bought a cool fire 4 box mod from amazon and it did come with a tank so I was recommended by a friend to get a galaxies MTL RTA tank, they've both arrived and I've put it together but it's saying "check atomiser". Ive just received it and I'm hoping it's not broken, any help is appreciated thanks!!

As your friend recommended the Galaxies tank, I presume they know how to build it. Would they not be able to help you with it? If not, I would recommend the Zenith D22 tank.
https://www.cremedevape.com/Innokin-Zenith-D22-MTL-Tank