OK I'm going to try this mod and here are the before and after pics.
Skimmer specs:
DIY skimmer with 11L x 7.5W x 9H box
Main riser is 17.5" high x 6" OD x 5.5" ID
Secondary riser is 14.5" high x 4" OD and 3.5" ID
Pump - Iwaki 70RLT through one beckett injector
This is the pic of the whole skimmer and the two nails are taped on to the middle of both risers. I had just cleaned the top part last night and this has been running for about 11 hours since the clean.
As previously posted, I'm looking to reduce the smaller riser by 11 inches and increase the big riser by 11 inch. But for this test, they will remain as is for the time being.
Macro shot of bubbles in big riser
Macro shot of bubble in small riser
So my intention is to plug up the hole with silicone and then drill 20 x 1/16 holes into the beckett housing. I will then take photos, then increase the number of holes by 5 at a time and take photos again, until I get what I want to achieve in terms of foam production.
Don't hold your breath for an update soon.... wil probably take me a few days at least.