Step 7: [Update] Few days later...

Picture of [Update] Few days later...
As you see some white particles precipitated (this is the right word? :P) from the water-paint solution. And in a cold enviroment they don't want to mix. So this could be either annoying or a unplanned visual effect.

Also making bigger bubles is hard for a cold bottle.
-KungPow-5 years ago
 do you have to keep adding alka seltzer?
Dzwiedziu (author)  -KungPow-5 years ago
I you want to keep it going, then yes. But at some point the mixture will become saturated with with the tablet's remains. A this point I don't know if it will work any more.
 aww thats too bad... does anyone know how to build a lava lamp that stays going by itself?
there's also another way with benzilic alcohol, and salty water (4.8 % of salt), with tis method you must use the bulb under the bottle otherwise it doesen´t work YOU CAN SEE THE RESULTS HERE: http://www.youtube.com/watch?v=aQEvSLmi0tk&feature=related
Yes, http://www.youtube.com/watch?v=3u6JE3TKBg4 and http://www.youtube.com/watch?v=SZbMmH-y8hY&feature=related made with mineral oil, alcohol 70%, alcohol 95%, oil based coloring, and trementin