[grim]

from my limited knowledge i do know that some of the glass diffusers ceramic discs are just to fine for the diy co2 to build up enough pressure i use a very small nail and just punch a hole in the cap of the two litter bottle cut the airline tubing at an angle stick the pointed end in the hole pull it threw with a pair of pliers and i have never had a leak i have this setup on three different tanks i was just wondering if your two litter bottle is really hard or not can you take a picture of your full setup

 

[grim]

i have never used that diffuser so i cant speak for it did you check your bottle to see if it is hard i cant really help till i know that if the bottle is really hard then yes the diffuser most likely wont work for awhile till i got a glass diffuser that did work i just ran the tube into my intake on my filter and let the hob filter do the work it did work a little but i wasn't getting everything outa the diy co2 i could also hear the bubbles going through the the filter my co2 bottle is also on the ground and i have never had a problem