The fountain looks great, love the sound and lights. I have it outside in the garden where it gets sun for a couple hours. After 3 days, the water was needing to be refilled 2x daily. Inspected back and realized water was streaming out from it. Removed top bowl and saw that the caulking around tubing connection was dried up and had broken away.  
I have made many fountains so had some caulking tape and seems to be working for now. 
The water in third bowl splashed out a bit; would be better design if outside rim was an inch or so higher. 

Overall really like look of it; hope it holds up to the weather!