Works great, use 2 drops per ounce of filtered or distilled, NOT TAP water.
Bought this straight from 420Science website but should have gotten it off of Amazon for 2 dollars cheaper.  Oh well, this product works well.  Basically what I have worked out is that you need 2 drops per ounce of water used.  It is best to get yourself a small 16-20oz bottle and get yourself some filtered or distilled water.  DO NOT USE TAP WATER or this stuff will not work nearly as good or for nearly as long.  Mix it up really good, get your mixed up water cold and pour it in your water pipe.  Obviously this only works in a water pipe or bubbler that has water in it at all times.  Mixed up as said above, this keeps my glass water pipe clean from resins and junk sticking on the sides.  My glass piece has two percolators as well as an ice catcher and before, the resins would collect on the tops of the percolators as well as above the ice catcher where water didn't touch all the time.  Now, this does not happen.  The water doesn't taste bad but is actually semi sweet/sour.  No harmful products that would hurt you in any way from accidentally drinking the water.  This stuff works great and as advertised.  I don't change my water daily, but every 2-3 days of moderately heavy daily use and it doesn't clog up or taste bad even by then.
Rating: 5 stars