Well this might sounds bad, but I think my worm castings gave me a gas problem. I followed the instructions in the sticky above on preparing them and so far they have been great for the plants. The other day my girlfriend was looking at my tank and she asked me if I had meant to put a mound in my front of my hc bead. I told her no it was a mistake and I hadn't noticed it before? After a day of looking at it I decided to try and get under it and pull out some of the substrate so I could level it out. Well F%$# soon as I poke my tweezers in the substrate a tone of gas came pouring out up into my armpit (24" deep tank and I was using my tiny HC tweezers). I almost hit the roof, I just wasn't expecting it. Now I have noticed gas bubbling out all over my tank, I don't see this a tone but I have seen it a few times. If I am planting I almost always get some gas coming out. I have noticed a couple more large gas bubbles from the soil raising up, but because I know what it is now I released them right away. Any suggestions. Could I use Malaysian Trumpet Snails to help release the gas or would then mess up my HC when the pop through?