I successfully introduced my betta to the 10g, which is currently stocked with 5 harlequin rasboras. He ignores them completely, but the filter is REALLY giving him a hard time. It's a Fluval 1plus with a grill intake and submerged 1/2" circular outtake. The rasboras don't seem to mind it but how can I curb the flow a bit so Pastel isn't getting thrown around like a leaf?