Yes I delt with that for about 10 years, and the same as Suggested I also weight myself every morning, take my diuretic in the morning and try to plan my next 4 hours near bathrooms as I worked on the road and with driving long distance was always a challenge. Usually about 3 trips to the bathroom over a 4 hour period. And my weight check was 3 lbs in a day or 5 lbs over 3 days. Once I got stable the doctors would just let me up the dose if my weight went over 5 lbs and did not drop the next day.
I was not on Lasix tho mine was another one I don't remember now but very similar. If I can help with any questions please let me know
Did they say what his Injection Factor is? Typically to be called CHF its suppose to be less that 30% but I was even on it at 45 % due to rhythm problems also.
Blessings