UF volume and rate in ARF

How do you decide UF volume and rate in ARF?

My concern is that we have to remove adequate UF in oligouric or anuric patients so that they don’t develop fluid overload, but at the same time if we remove excess UF voulme patients might have further pre renal type of ischemic injuries to kidneys leading to delayed recovery from AKI ( after all Hemodialysis itself to some extent is nephrotoxic !)

So how do you adjust the balance ?

My second question is how frequently ( daily or alternate day or only when required ) you prescribe hemodialysis in ARF patients ? And how long to continue dialysis in such patients ?