Thanks for the info guys, looks like the leak was user error

filled it up a little too much, once the level dropped, the leaking stopped. I got this as part of a kit I bought as well, seems to be a nice little clearo, my usual is the mini nova and I have a carto tank as well. My T3 seems to be terminal, I do like the clearo, especially the added capacity but it has leaked like a champ since I got it, even when not in use! So I haven't bought another. Was trying this out as a 'spare' really, just something to put in a corner and know that it works should all else fail!