Plastic water pipe with plug at one end and water supply from other end have holes every 5-6cm (3-4mm diameter). Pipe can rotate so you can manually adjust angle of water towards the glass. The more directly water flows towards glass it flows down the glass wider. You only need to ajust pipe angle so there is no gaps between water stream down the glass. I don't know did I explained this so it is understandable
How did u get the water to flow so nice? I’m stuck with tryin to get my waterfall to flow like yours. I’ve tried big to smaller holes with putting a lot of holes to not so many and nothin is working! Please help! I’ll be so grateful for any suggestions 😢