Hey everyone this is a re-re follow up regarding the cart filter,using the material without compressing it together i found the cart did'nt last to long, but to get on with the post, i am still using the fish tank filter which can be purchased at any fish store (but it is the plain white filter for tanks with a built in filteration system,it is plain white with no carbon in it and it has a layered look,its about a inch thick and can be bought in sheets) what i do is peel about 1/3 of the layer off and i put it in between a towel and press the layers together with an iron cause if you use it as is then the juice does'nt hold very well and the cart does'nt last very long. So after that is done i pre-soak the ironed piece of material in water for about 24 hours to break it in so it can get use to holding liquid and after that i just take it out of the water put the material in between a towel and put pressure on it to dry it ,then cut and use, i've been using these carts for about 5 days now and only twice in roughly 50 carts have i got a little juice in my mouth,but that only happens if you overfill.After the 2nd or 3rd time you refill the cart, the material soaks in the juice really good.I use johnson creek smoke juice and other brands of e-juice in case anyone was wondering what kind of juice i've been using.It works really good and there is no burning of material in case you were wondering.I hope this helps someone looking for some answers to the cart material questions.