I put a cap on the bubble tube with a 1/4" hole in it and I reduced the water output. At the same time a ended up getting some more height out of the fountain created.
It's shooting up 8-10' in the air now. I like it but want to reduce it down more.
I almost went with a geyser pump style for the inflow inside the barrel. That could have been interesting had I went with it. To do that, inside the barrel I would have put 2 90* bends on the up pipe so the bottom faced up. That would cause it to build a massive bubble before releasing am at once instead of little by little.
