Just want to share my thought on Marineland Corner-flo features.
My 125 gallon tank has two corner-flos, each is rated to handle a max of 700gph flow rate. Each drain pipe has a piece of air tubing at the top to prevent full siphon as a full siphon can easily exceed 700 gph for a 1.5" pipe.
The corner-flo has a removable front panel which as you can see has a large lower grille and a top skimmer grille. The large lower grille collects water from the lower middle water column
With the front panel removed.
Here is my problem with the corner-flo
Left corner with return
Right corner
You can see there is plenty of water coming from the lower grilles but little to no water thru the skimmer grilles. The water level is higher than the bottom of the skimmer grille but the "teeth" kind of prevent the water from coming thru.
If I remove the panel, there is good amount of water coming thru but I lose pulling water from the lower middle section of the tank.
What if I cut out the center portion of the "teeth"? Thoughts and suggestions on how I can get good skimming at the top. Increase water flow rate to the DT tank can help by raising the water level but that also introduces a lot of gurgling and noise as it exceeds the 700gph limit. The drain will go in and out of siphon creating a lot of noise:crazy1: