I have a good air trap idea, I'll try to upload pics when I'm done.
I'm using a 1 3/4 OD, 1 1/2 ID acrylic tube. I also have a 1 1/2 diameter arcylic rod, from which I will cut a 1/2" plug for the tube, drill, and cement for the bottom of the air trap (outlet). For the inlet, I have a 2 in. OD, 1 3/4 ID tube, from which I will also cut a 1 in. section. Drill through both the original tube and this larger piece, slide (with great effort) the larger piece over the original tube, so I have enough thickness to tap threads/cement for another barb, and there you have it
Again, that might sound confusing, sorry, but I'll have pics up soon hopefully
any suggestions, tho?
oh, and sorry if this was someone else's original idea