jessup, sorry your Dad is having these problems. I always took my husband to the clinic when he was on dialysis and I told them what amount to take off and watched as they set the machine up. You have to stand up to them or they will ring him out like a sponge. Pissed me off numerous times and then I turned into a real bitch. Tell them outright that they are taking too much off. Hope things improve and keep us posted.