Floating Somatic Modular Return Pump Basket

[AdamNC]

Anyone else having issues where as if you push through too much GPH it drains too fast and floats? I woke up this morning to the basket being nearly drained and floating and a slurping sound from the return pump. The return pump is only a Sicce Syncra Silent 2.0 568GPH. When the pump is turned all the way down it does fine but even at 4-5 clicks on the pump flow control the basket can't keep up. This is a new system so the Modular Return Pump Basket Filter is still very clean.
There seems to be no real way to secure the basket and I don't want to rig it to not float, ie: clamp it or load it down with rocks.
I have 7" of water in it as it states the Somatic 60S Skimmers needs 6"-9" of water.

@Somatic Aquaristik

 

[Blue Spot Octopus]

Could use some leftover magnets to hold it to the side of the sump?

 

[AdamNC]

Maybe a Tunze magnet set but I have no extras. Image when you push a bowel into the water and it just floats, similar to that. At the lowest setting on the pump it’s fine but if that is the case then I’d of been better getting the Sicce 1.5. I’ve got the eshopps eclipse s overflow so I know at least that can handle 700gph.