changing from air diffusers to venturi?????
 

Anyone has experience with this change?
Here is what I will try, I have an old skimmer 4" acrylic about 30" high. It has 2 air diffusers. I would like to change it to a venturi skimmer.
The plan is to place a 1 1\2 diameter tube inside the 4" dia. tube. place the water inlet into the 1 1\2 dia tube. This tube will be used as a mixing chamber. I will purchase a venturi (kent if I can find one)and I will add it to a mag drive pump.
Anyone know how close to the cup should the 1 1\2 tube be. Any ideas on improving this experiment?

changing from air diffusers to venturi?????
 

Hello,

If I understand you correctly, there's no easy answer. This is because the size and height of your inner tube, along with the water/air speed coming in, will have a huge factor on the surface turbulence. This is one of those cases when you really have to experiment and play around with the different settings.

changing from air diffusers to venturi?????
 

what you are thinking would give you something along the lines of a seaclone designe if I am understanding this right.
this page has the mods that you need to make a seaclone work good and I think it might give you some ideas on how to set yours up
Seaclone Mods

Steve

changing from air diffusers to venturi?????
 

Thanks!! I think some experimenting is in order,

changing from air diffusers to venturi?????
 

Welcome to the board Nigel.

AS for the cup height it will be coming down to experimenting. Can you make a drawing of the skimmer? or a pic? I can help you more from there with some suggestions and hints for skimmer construction.