Give it a try - it's working great for me!

I went over 4 hours today without having to refill a cart and had zero flooding or leaking.
If you can't find any of the blue fishtank filter material, try a piece of 3M green scrubby. The key seems to be spongy material with holes that let the
juice through without flooding the atty. You only need to plug the end of the cart which leaves more room for juice.
Check out the current threads in the mod section for more info.